#chlamydoselachidae

[have-you-seen-this-animal]

have you done a poll on frilled sharks yet?

Not yet!

Photos thanks to Kelvin Aitken & Awashima Marine Park!

[unofficial-sean]

The frilled shark (Chlamydoselachus anguineus) is the most famous hexanchiform in image.

The bluntnose sixgill shark (Hexanchus griseus) is the most famous hexanchiform in reputation.

[bestanimal]

Round 3 - Chondrichthyes - Hexanchiformes

(Sources - 1, 2, 3, 4)

The Hexanchiformes are a primitive order of sharks, of which only 7 species in 2 families remain. These families are the Hexanchidae (“cow sharks”, also called “sixgill sharks” or “sevengill sharks”) and Chlamydoselachidae (“frilled sharks”).

Hexanchiformes have one small, spineless dorsal fin located over or behind the pelvic fins and one anal fin. Their cartilaginous vertebral column extends into the long dorsal lobe of the caudal fin, while the ventral lobe of the caudal fin is either small or absent. They have either six or seven gill slits, a large mouth, and small spiracles located well above and behind the eyes. The eyes have no nictitating membrane. Hexanchiformes are most common near the ocean floor in cold, deep water in the tropics, but are also found closer to the shore in more temperate regions. Many of these sharks exhibit vertical migration, following prey closer to the surface at night, and submerging back to the depths during the day. Hexanchiformes are ovoviviparous and feed on yolk within their mother. They have litters of varying size, ranging from 2 to 108 pups, depending on species.

The Hexanchiformes date back to the Early Jurassic, with some evidence of even earlier existence in the Permian. Fossil Hexanchid teeth have been found dating back as early as the Late Jurassic, and Triassic sharks appear very similar to modern Hexanchids. However, while the Chlamydoselachidae (frilled sharks) look ancient, they arose in the Late Cretaceous with most other modern shark families.

Propaganda under the cut:

The Sharpnose Sevengill Shark (Heptranchias perlo) and the Broadnose Sevengill Shark (Notorynchus cepedianus) are the only species of sharks to have seven gill slits.

Some Bluntnose Sixgill Sharks (Hexanchus griseus) recieved a unique spotlight when they began repeatedly bumping into the submarine of the Blue Planet II film crew, thinking the crew was after their whale carcass.

The Broadnose Sevengill Shark (Notorynchus cepedianus) (image 1) is the only shark in this order known to pose any threat to humans, due to their habitat being in proximity to humans and propensity for retaliating when provoked. Human remains have been found in one specimen's stomach, though these were likely deceased, drowned individuals, as this species has a reputation for feeding on anything it can fit in its mouth. In 2020 a 13 year old girl was bitten while surfing at Oreti Beach in New Zealand. The girl continued to surf for an hour before realizing her leg was bleeding.

Unlike its relatives which will often scavenge carrion and feed on whale falls, the Atlantic Sixgill Shark (Hexanchus vitulus) is known to be much more picky. It will not feed on prey after it has been dead for 24 hours, instead ignoring older prey to move on to its next kill.

Nothing could really hurt you in the freediving sim “Endless Ocean” (in the first game anyway) but I still got really freaked out when I had to dive down in the trenches. So whenever I had to do some deep-deep-diving, I would immediately go and find a frilled shark to befriend, because if you fed them enough they would follow you around. Having a smiley little buddy by my side always made me feel much calmer in that area, so frilled sharks still give me that little boost of seratonin just by association. They were there for me even when my stupid Risso’s Dolphin was effin off to go harass a squid or whatever.

While the two species of frilled shark that are alive today are relatively small, the larger of the two being the 2.0 m (6.6 ft) long Frilled Shark (Chlamydoselachus anguineus), some extinct species could get to be very large. The Late Cretaceous Rolfodon goliath was likely the largest, reaching an estimated 5-6 meters (19 ft 8in) long.

Meanwhile, the Southern African Frilled Shark (Chlamydoselachus africana) is much smaller, with the largest known female being the immature 117 cm (3.8 ft) long holotype, and the largest known male measuring 99 cm (3.2 ft) long.

They go like :o

Some Hexanchiform eyes fluoresce green (when the shark is alive)

(source)

[encyclopika]

Animal Crossing Fish - Explained #241

Brought to you by a marine biologist with some snakey shark...

CLICK HERE FOR THE AC FISH EXPLAINED MASTERPOST!

Fish are fascinating. Although, yes, I'm very biased, I'm also saying it because the two largest groups of them - the bony fish (Osteichthyes) and the cartilagenous fish (Chonrichthyes) - come in some wild shapes and sizes. And some of these shapes, like that of today's fish, the Frilled Shark, are still just weird as hell.

I'm actually really surprised that ACPC added this shark in, but they did! It was a special catch for the Deep Sea Shark Goals back in July 2023. The art is also so spot on given just how weird this guy is! Look at the teeth in perfect rows! The fins are all the way towards the back of the body! The gills are even frilled (that's where the name comes from!) to the point you can see the red gill tissue inside! It's really great. Although there are two species of Frilled Shark now, and they look very much the same, I'm going to say this is definitely the OG Frilled Shark - Chlamydoselachus anguineus - that everyone knows and loves. (The other species, the Southern African frilled shark (Chlamydoselachus africana) was only described in 2009, so I just doubt it's the one featured here.)

It's hard to find good pictures of a healthy frilled shark since, if you're seeing them at the surface in broad daylight for a good picture, odds are, that guy is on his way out, unfortunately. These are relatively deep-sea sharks that live their lives like a lot of twilight zone animals do - hopping on the Great Diel Migration, where they hang out at depth during the day, but go up to the surface at night to feed.

If there is any shark that is called a "living fossil" it's this one. With the snake-like body and six gills and pretty much a lack of a rostrum, this isn't the first image you would conjure when someone says "shark". And just from my experience talking to people about sharks since I was really small, I've noticed that when people think "shark" they are more than likely imagining the sharks of Galeomorphii, or the Galean Sharks, which include the Great White, the Whale, the Hammerheads, and just your typical shark friends.

The Frilled does not belong here.

By © Citron, CC BY-SA 3.0, (Do you see what I was saying about the teeth being in perfect rows???)

There is a whole other SuperOrder of sharks called the Squalomorphii, or Squalean Sharks. The Squaleans are typically told apart from the Galeans by lacking traits, such as an anal fin (which isn't the case in the frilled shark, so we'll move on), no nictitating membrane over the eyes, and differences in skull morphology. These guys are diverse, weird...and sometimes disrespected. A lot of them are called "dogfish" and where I'm from, dogfish aren't even considered "real sharks". I can't complain too much since I never count dogfish as "seeing sharks" when I'm out at sea. Many of them are small. But this group also includes famous sharks, like the Greenland shark, saw sharks, angel sharks, and the very primitive-looking Cow Sharks, for which the Frilled, we think!, belongs.

Cow Sharks, the Hexanchiformes, are a bunch of weirdos with six or seven gill slits, where other sharks (and most rays!) all have five gill slits. They're typically deep water sharks that can only rarely be studied. One of them, the broadnose sevengill, though, is a resident to San Francisco Bay, California, so it's not necessary to be deep sea when you're a weird, primitive shark. Even so, the Frilled Shark is a weirdo among weirdos, and it's been placed in many other groups of extinct sharks since its discovery. However, genetic analysis done in 2016 puts it in with the Hexanchiformes, but still apart in its very own Family - Chlamydoselachidae. That's what happens when you're a shark that looks and swims like an eel, has trident teeth, and has a weird head with weird jaws. Did I mention these things grow to be 6 feet (2m) long?

And there you have it. Fascinating stuff, no?

[pleistocene-pride]

Chlamydoselachus anguineus better known as the frilled shark or lizard shark, is one of the two extant species of shark in the family Chlamydoselachidae with the other being the southern African frilled shark. These sharks are native to the Atlantic, Arctic, and Pacific oceans, usually in the waters of the outer continental shelf and of the upper continental slope, where the sharks usually live near the ocean floor, near biologically productive areas of the ecosystem some 160 to 5,150ft (50 to 1,570m) below the surface. They feed upon cephalopods, smaller sharks, and bony fish, often taking part in the diel vertical migration of aquatic animals from the depths to the surface. When hunting food, the frilled shark curls its tail against a rock and moves like an eel, bending and lunging to capture and swallow prey whole with its long and flexible jaws, which are equipped with 300 recurved, needle-like teeth. With males reaching around 3 to 5.3ft (.91 to 1.62m) in length and females reaching 4.3 to 6.6ft (1.31 to 2.01m), the frilled shark has an elongated eel-shaped body, and a flattened snake-like head with a very short snout and a large terminal mouth. It has six pairs of curved gill slits, with the lower ends of the first pair connected under its throat. Its dorsal fin is low and much smaller than the anal fin. Its pectoral fins are smaller than its pelvic fins. The coloration is Dark chocolate-brown, brownish-grey, or brownish-black. Frilled sharks do not have a defined breeding season, they are Ovoviviparous, with females giving brith to 2-15 pups per after an up 3.5 year gestation period. Under ideal conditions a frilled shark may live upwards of 25 years.

[miiilowo]

IM SORRY FOR FORGETTING ABT THE FISH FOR YESTERDAY i was cleaning my closet out. :] my back hurts now. so heres a 2 for 1

The whale shark (Rhincodon typus) is a slow-moving, filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 18.8 m (61.7 ft). The whale shark holds many records for size in the animal kingdom, most notably being by far the largest living nonmammalian vertebrate. It is the sole member of the genus Rhincodon and the only extant member of the family Rhincodontidae, which belongs to the subclass Elasmobranchii in the class Chondrichthyes. Before 1984 it was classified as Rhiniodon into Rhinodontidae.

The whale shark is found in open waters of the tropical oceans and is rarely found in water below 21 °C (70 °F).[2] Studies looking at vertebral growth bands and the growth rates of free-swimming sharks have estimated whale shark lifespans at 80–130 years. Whale sharks have very large mouths and are filter feeders, which is a feeding mode that occurs in only two other sharks, the megamouth shark and the basking shark. They feed almost exclusively on plankton and small fishes and pose no threat to humans.

The species was distinguished in April 1828 after the harpooning of a 4.6 m (15 ft) specimen in Table Bay, South Africa. Andrew Smith, a military doctor associated with British troops stationed in Cape Town, described it the following year. The name "whale shark" refers to the fish's size: it is as large as some species of whale. In addition, its filter feeding habits are not unlike those of baleen whales.

The frilled shark (Chlamydoselachus anguineus) also known as the lizard shark, and the southern African frilled shark (Chlamydoselachus africana) are the two extant species of shark in the family Chlamydoselachidae. The frilled shark is considered a living fossil, because of its primitive, anguilliform (eel-like) physical traits, such as a dark-brown color, amphistyly (the articulation of the jaws to the cranium), and a 2.0 m (6.6 ft)–long body, which has dorsal, pelvic, and anal fins located towards the tail. The common name, frilled shark, derives from the fringed appearance of the six pairs of gill slits at the shark's throat.

The two species of frilled shark are distributed throughout regions of the Atlantic and the Pacific oceans, usually in the waters of the outer continental shelf and of the upper continental slope, where the sharks usually live near the ocean floor, near biologically productive areas of the ecosystem. To live on a diet of cephalopods, smaller sharks, and bony fish, the frilled shark practices diel vertical migration to feed at night at the surface of the ocean. When hunting food, the frilled shark curls its tail against a rock and moves like an eel, bending and lunging to capture and swallow whole prey with its long and flexible jaws, which are equipped with 300 recurved, needle-like teeth.

Reproductively, the two species of frilled shark, C. anguineus and C. africana, are aplacental viviparous animals, born of an egg, without a placenta to the mother shark. Contained within egg capsules, the shark embryos develop in the body of the mother shark; at birth, the infant sharks emerge from their egg capsules in the uterus, where they feed on yolk. Although it has no distinct breeding season, the gestation period of the frilled shark can be up to 3.5 years long, to produce a litter of 2–15 shark pups. Usually caught as bycatch in commercial fishing, the frilled shark has some economic value as a meat and as fishmeal; and has been caught from depths of 1,570 m (5,150 ft), although its occurrence is uncommon below 1,200 m (3,900 ft); whereas in Suruga Bay, Japan, the frilled shark commonly occurs at depths of 50–200 m (160–660 ft).

really fond of the frilled shark i think it is lovelhy and a little ugly but that is what makes it lovely

[nature-and-biodiversity-blog]

Frilled Shark Chlamydoselachus anguineus

[the-mists-of-time]

[sunkentreasurecove]

[chatnip]

@chlamydoselachidae

me, a simple child: wow I can’t wait to catch up on some Polygon Content

polygon: hmmm, interesting *uploads 27 more videos and produces three new podcasts*

[obaewankenope]

What do you know about frilled sharks?

Drop me questions about sharks, animals, whatever! I'll answer them! Also consider leaving me a tip if you can! It's appreciated!

I know they're the most primitive form of shark around.

Taxonomy

Hexanchiformes.

Pronounced HEH-CAH-X-CHI-FORMS if you're me.

They show up in fossil records around the Early Jurassic around 201 million years ago. There are currently only seven extant species of this order of shark.

I actually give a breakdown of Geological Time Periods in this post here if you're interested.

Extant means "surviving".

Frilled sharks, or Hexanchiform sharks, have a single dorsal fin, six/seven gills, and no nictitating membrane on their eyes.

Scientific classification goes: kingdom, phylum, class, superorder, order, family, genus, species.

Scientific classification is also called "taxonomy".

Going down the list of taxonomy the most well known of the order Hexanchiformes, the family Chlamydoselachidae, and the genus Chlamydoselachus, is the Frilled Shark. Its called a "living fossil" because the Frilled Shark is basically an unchanged species from when it was found in the fossil record to today.

The only other Living Fossil in the genus is the Southern Frilled Shark found only along the coastal waters of South Africa.

The Frilled Shark is called such because of the way its six gills seem crinkled like a frilly end on a sleeve from 17th century France.

Image source: wikipedia

See what I mean? Also, that face is just wrong.

Range/Habitat

These sci-fi monster rejects can be found along the outer edges of the contintental shelf, middle of the way of the continental slope and in upwellings. They are not deep water/open-ocean swimmers basically. They will stick close to the ocean floor in these areas however but their diet of smaller sharks, bony fish, and cephalopods, suggests they swim up and down vertically for hunting. They're also night hunters.

Because of course they are.

Look like an eel, swim like an eel, appear in the night to munch on a lil squid.

Lovely. I don't know why people are scared of the ocean, honest. [sarcasm]

Depending on where around the Atlantic and Pacific the sharks can be found (called a "shiver" in their lil groups btw), they can be found between 50 and 200 metres or 100 metres (August to November) around Honshu, Japan.

The image below, pilfered from Wikipedia, shows the habitats of Frilled Sharks around the globe. They're basically island water sharks.

Description

They look like eels but oh boy are they not eels. They're demon eels. Eels from islandly hell.

They have 21-29 rows of teeth. But not just any ol teeth. No. Not traditional 'shark' teeth. Nope. These teeth are recurved (curving inwards) and like damned needles! Perfect for catching bony fish, smaller sharks, squishy cephalopods, and my soul as it tries to escape.

It bites, it ain't letting go. It's gonna keep biting in increments until it gets it all down.

Le rip my soul.

Oh and they have something like 300 teeth in those jaws there.

Image source: wikipedia and my nightmares

They max out at around 2 metres in length (for females, guys are about .3 metres shorter heh) and have broad, flat heads with short snouts that are rounded not pointy like Great Whites. They don't have nictitating membranes like most other sharks (and cats). They can open their mouths waaay bigger than they should in my opinion to eat stuff that's half their length!

Not okay, sir!

Just like gulper eels and the monster from my nightmares- oh wait, this is the monster from my nightmares.

The dorsal fin is closer to the end of the body than the front, smaller and more rounded on the tip than other sharks. As are their pectoral fins. Their tail is very long and doesn't have lobes like other sharks, so the caudal fin (the tail) is just like an eels!

Here's a drawing of what the Frilled Shark looks like according to a scientist who obviously doesn't consider them to be his nightmare monster.

Image source: wikipedia

The one (1) good bit of news I have is that the bite force of the Frilled Shark is pretty abysmal. Not that that'd matter over much when you're being stabbed by 300 needles but, you know, silver lining.

Reproduction

Frilled Sharks reproduce via ovoviviparously aka they make eggs inside, they hatch inside and then are given birth to as live pups. Gestation can be as long as 42 months (three and a half years) and a litter can be between 2 and 15 with 6 being the average.

Video

And at the end of all that, here's a lovely video for you to watch that shows a Frilled Shark in action in the dark vastness of the ocean!

[onceuponatimeaw]

The frilled shark (Chlamydoselachus anguineus) and the southern African frilled shark (Chlamydoselachus africana) are the two extant species of shark in the family Chlamydoselachidae. The frilled shark is considered a living fossil, because of its primitive, anguilliform (eel-like) physical traits, such as a dark-brown color, amphistyly (the articulation of the jaws to the cranium), and a 2.0 m (6.6 ft)–long body, which has dorsal, pelvic, and anal fins located towards the tail. The common name, frilled shark, derives from the fringed appearance of the six pairs of gill slits at the shark's throat.

The two species of frilled shark are distributed throughout regions of the Atlantic and the Pacific oceans, usually in the waters of the outer continental shelf and of the upper continental slope, where the shivers usually live near the ocean floor, near biologically productive areas of the ecosystem. To live on a diet of cephalopods, smaller sharks, and bony fish, the frilled shark practices diel vertical migration to feed at night at the surface of the ocean. When hunting food, the frilled shark moves like an eel, bending and lunging to capture and swallow whole prey with its long and flexible jaws, which are equipped with 300 recurved, needle-like teeth.

Reproductively, the two species of frilled shark, C. anguineus and C. africana, are aplacental viviparous animals, born of an egg, without a placenta to the mother shark. Contained within chondrichthyes (egg capsules) the shark embryos develop in the mother's body; at birth, the infant sharks emerge from their egg capsules in the uterus, where they feed on yolk. Although it has no distinct breeding season, the gestation period of the frilled shark can be up to 3.5 years long, to produce a litter of 2–15 shark pups. Usually caught as bycatch in commercial fishing, the frilled shark has some economic value as a meat and as fishmeal; and has been caught from depths of 1,570 m (5,150 ft), although its occurrence is uncommon below 1,200 m (3,900 ft); whereas in Suruga Bay, Japan, the frilled shark commonly occurs at depths of 50–200 m (160–660 ft).

[shalmonsdraws]

art fight Attack/Revenge for @chlamydoselachidae !  <3

tried an AC-inspired chibi style & had a great time;;  why do i get the feeling most of my ArtFight content is going to look like this, lol

[tearzah]

commission for https://www.deviantart.com/chlamydoselachidae … !

[captainswaglord500]

Barbel-Croc

Kingdom: Animalia

Phylum: Chordata

Class: Chondrichthyes

Order: Hexanchiformes 

Family: Chlamydoselachidae

Genus: Suchocarcharius

Species: S. barbus (”crocodile-shark with barbels”)

Ancestral species: Chlamydoselachus anguineus (Frilled shark)

Time period: early to late Solocene (105 million years to 140 million years in the future).

Information: a close relative of the Giant Eel Shark and the Circumpolar Eel Shark, the Barbel-Croc descends from the same common ancestor, albeit its ancestors branched off from the Eel Shark genus. As its name would suggest, it is remarkably-crocodilian in appearance. However, it is also has a few unique features that set it apart from other sharks. Like only a handful of fish in the future, it possesses something reminiscent of a neck (which is really just an extension of the the spinal column). It also posses two sets of barbels, with one under its nose and the other under its bottom jaw. The Barbel-Croc is not very large compared to either of its relatives, being around 10 feet when fully grown. However, Barbel-Crocs have also developed a unique way to counteract their smaller size: they hunt in groups. Small packs of around 3-5 individuals will join together to take large prey such as whales. However, when they aren’t hunting in packs, they are perfectly content hunting smaller prey in the shallows. The Barbel-Croc’s range extends across the tropical seas of the world, and it has, on occasion, been spotted in estuaries. In color, the Barbel-Croc is almost completely gray, save for its bottom jaw down to the gill region, which is bright-yellow, as well as the tips of its barbels. 

[enigmahitam]

Hiu berjumbai (Chlamydoselachus anguineus) atau Frilled Shark dalam bahasa inggris merupakan salah satu dari dua spesies ikan hiu yang masih ada di keluarga Chlamydoselachidae dengan distribusi yang luas tapi tidak merata di samudra atlantik dan samudra pasifik. . Mereka ditemukan dikedalaman 1.570 meter, sedangkan di teluk surugaya jepang hiu ini paling umum ditemukan pada kedalaman 50-200 meter. . Namun pada tahun 2009 jenis baru hiu berjumbai di afrika selatan, dan pada bulan november 2017 baru-baru ini hiu tersebut terdampar di pantai di portugal. . hiu ini merupakan penghuni laut dalam yang menyebabkan metabolisme tubuh hiu ini menjadi lemah karena suhu yang sangat dingin diperairan dalam. . Perairan dalam ini pula yanng menyebabkan memiliki bentuk fisik yang unik, hiu berjumbai telah tercatat dari sejumlah lokasi di samudra atlantik dan pasifik, yaitu di atlantik timur di norwegia, di utara skotlandia, irlandia barat, dari Prancis hingga ke maroko termasuk madeira dan luar mauritania. . panjang rahang hiu berjumbai sangat bisa dibedakan dengan kelenturan yang sangat lebar, sehingga memmungkinkan untuk menelan mangsa utuh lebih dari setengah ukuran nya, hiu ini biasa memangsa cumi-cumi, ikan, hiu lain yang berukuran kecil seperti hiu kucing jepang (Apristurus japonicus). . Sc image: Australian Geographic Sc caption: Wikipedia ============================================ Kunjungi kanal Enigma Hitam di YouTube untuk konten video misteri, konspirasi, sejarah, mitologi, creepypasta dan lainnya. . Follow instagram ini untuk mendapatkan kasus atau kisah menarik lainnya ⬇ ❓ @enigmahitam ❔ ❓ @enigmahitam ❔ . #enigmahitam #enigma #creepypasta #konspirasi #mitologi #sejarah #film #horror #alien #podcast #fakta #misteri #lovecraftmythos #indonesia #hplovecraft #beritaviral #trendingtopic #trending #infomenarik #info #infounik #infoterkini #faktaaneh #faktaunik #faktamenarik #reels #prasejarah #fossil https://www.instagram.com/p/CoTl_aEPv8L/?igshid=NGJjMDIxMWI=