#denticle

[fishyfishyfishtimes]

Daily fish fact #852

Denticle herring!

It is so named for the denticles it has on the surface of its head. It is the only species in its entire family, the Denticipitidae, having diverged from other herrings and anchovies near the Late Jurassic to Early Cretaceous era.

[eddieintheocean]

Dude wtf your dermal denticle just bit me

[dyingstars-if]

i was today years old when i learnt that whale sharks have teeth on their eyeballs.

[wavesfromthedeep]

[INCOMING BROADCAST: Fathoms of Dreams]

FOD: Ah, I always had quite the opposite problem with my citizens.

FOD: My chamber is designed to be flooded! It’s quite uncomfortable if not. Though, of course, some thing or another needs to enter and is… incompatible with the flooded state.

FOD: Perhaps your little friend would enjoy my chambers!

- @tanzdoesthings

WFD: Fascinating...!

WFD: Yes! I'm fairly sure Keeper would love your chambers!! Rambunctious little thing. I'm more worried about its tendency to wreak havoc...

WFD: One of its modifications allows it to gain tremendous speed underwater. Unfortunately, my puppet was not designed to take a genetically modified slugcat to the face. I doubt yours was either... unless?

[tauforged]

figuring out….. mouth logistics. maybe

[bixell-pixell]

🎶✨when u get this, list 5 songs u like to listen to, publish. then, send this ask to 10 of your favourite followers (positivity is cool)🎶✨

[Absolutely no pressure if you don't want to do this, or don't want to send it to anyone else, it's just for fun!]

Ok uhhh

Boreas - The Oh Hellos

The Bird - Ok Goodnight

The Ballad of Jane Doe - Ride the Cyclone musical

The Fox, the Crow and the Cookie - Mewithoutyou

ABC -Polyphia feat. Sophia Black

Bonus Song, Denticle Waltz - a TADC freakshow fan song created by @ner5y

[great-and-small]

I feel so bad for whatever aquarium social media person who posted this who now has to read a million annoying NO SHARKS ARE SMOOTH comments in the notes. A genuine science education post about sharks is not the best place for that meme

While shark teeth tend to get a lot of attention, it’s the teeth on their skin that you should brush up on! Shark skin is covered in tiny, flat pointed scales that are called dermal denticles—which literally means skin teeth. If you look at a shark’s skin under a microscope, you’ll see that the scales are a series of overlapping teeth that result in a rough texture.

These pointed scales reduce drag on sharks as they swim, making them stealthy and fast as they cut through the water. This jagged texture also keeps fouling animals (like barnacles) from being able to settle on their bodies and slow them down, which is helpful when you’re a speedy top predator. 

TLDR: sharks are covered in tiny teeth and this makes them better swimmers. How’s that for a tantalizingly toothsome fact?

[sturgeonposting]

Lowkey grinds my gears when people tag me in pictures of gar

Like he is beautiful he is wonderful but he is not a sturgeon

He doesn’t even have denticles

he doesn’t even scutes

Come on guys let’s put on our thinking caps

[teachersource]

Did you know? Sharks’ skin helps them swim faster! You may know that shark skin is made up of scales called “denticles”, but you may not know that these scales are optimal for swimming quickly and quietly through the water. Each scale (shown here under an electron microscope) creates a tiny vortex and reduces both turbulence and hydrodynamic drag and enables the shark to glide almost silently through the water.

[mainblag]

sharks are literally the one animal you can say got away “by the teeth of their skin” and be right in saying it

[alyanas-little-hideout]

and gently pet that soft lil spot right above his eyes

Did you guys know that the most recent version of sharks have fins that are kinda leg like and they like to walk up onto land?

[yestrday]

: ̗̀➛ YANDERE SCIENTIST EXAMINES HIS NEWEST SUBJECT .

the scientists have caught an humanoid anomaly and needs to study it asap! to progress humanity's evolution, our brilliant scientist has to determine whether or not their newest specimen is suitable for... ahem... crossbreeding...

notes ! very much inspired from this yandere asmr on youtube... have fun!

( implied masc reader, slight nsfw, he's crazy!!!... and perverted )

YANDERE! SCIENTIST who immediately jumps on board when they report to him about the newest anomaly caught by the institute. these side projects have been boring him for far too long! he needs something new to simulate this brilliant brain of his, and what better to do that than some never before seen alien to study and experiment on!

YANDERE! SCIENTIST who fights tooth and nail to be the only scientist who gets access to you. these plebeians don't have the genius to even comprehend the most basic things about anomalies, much less even you! although he has a reputation for being... eccentric, he does eventually win the fight. after all, none of their puny successes can put a dent in his long list of accomplishments.

YANDERE! SCIENTIST whose breath gets taken away the moment he lays eyes on you, floating peacefully in the bubbling incubator. you look so relaxed, especially being an anomaly captured for testing and probing. lightly tapping on the glass, he watches as your eyes flutter open and you stretch your limbs to regain your senses. you seem so confused, having suddenly awakened in a vat full of liquid, but when you lock eyes with him there's naught but a thought behind those wide eyes of yours.

YANDERE! SCIENTIST who has you strapped down on the operating table, a wide grin stretching his handsome face as he slips on the latex gloves. aaah~ ♡ to have such an interesting specimen laid out so vulnerably for him! just for him! he absolutely overwhelms you with questions, even though he had just jabbed you with a syringe and are now too paralyzed to move your tongue.

YANDERE! SCIENTIST who makes you the teensiest bit in danger. although you're not accustomed to humans and their nature, there is something off in those turquoise eyes of his that sets your natural fight-or-flight.

YANDERE! SCIENTIST who's a bit too handsy with you, and if his co-workers were in the room with him they would have told him off for being unprofessional. but no one is here, only him and you, and what does an anomaly like you know about professionalism anyway?

YANDERE! SCIENTIST who eyes your bigger, more superior form with a predatory look. you encompass him by some inches, and your natural form is bigger than him. he wonders if your species is naturally like that, or if you're just the exception. nevertheless, it delights him how big you are compared to him, if the excited pants of his breathing don't give him away.

as he chatters on and on about his supreme intelligence and how lucky you are to have him studying you, you can feel his hands roaming around your body as he pokes and prods. his fingers graze against your denticles, grab the plush of your hips, squishing your cheeks and feeling around your mouth. the drug's worn off enough for you to start squirming, and you can see the absolute delight in those manic eyes as you start regaining your motor control back.

"so an aquatic-based humanoid anomaly, huh?" your eyes follow him as he jots something down on his clipboard. "bigger than the average human male... has denticles forming on their thighs, sides of face and neck... has extra limbs, tentacles, on the back, but is currently immobile due to drugs at the moment..." he sets the clipboard down and grins at you wickedly. "my subject, you truly are an intriguing specimen!"

he reaches for one of the tentacles protruding from your lower back, sliding a finger between the suckers, pleased by how they weakly twitch under his touch. an anomaly, a being superior to him in strength and speed, so vulnerable under him. "huhu~ despite the drug, you're very sensitive, aren't you? is this part of your genes or perhaps..."

he tucks your messy hair beneath your ear, breath tickling you as he draws himself nearer. "is it just you~?"

his laugh is maniacal as he watches blood color your odd-colored face. you're so big and strong yet so, so adorable. like lab mice. like a pet. he checks himself though, because for all his superiority complex, he is an experienced scientist, and he knows better than to underestimate his research subjects.

"well, well, my dear anomaly, it's time you familiarize yourself with me. i will be the one paying attention to you for these next few months, so it's best that you return that attention as well. it's only good manners, after all." you cock your head as he flashes his i.d at you, letters incomprehensible to you. he notices this and sighs.

"that's yuri isami to you, the captain of darkwick's mortkranken house and your supervising scientist." he introduces himself with a tone like you should have known him already, and he smiles at you with charming arrogance.

"best start practicing my name, since you'll be calling it many times, i'm sure."

YANDERE! SCIENTIST whose time and attention have been completely consumed by you. his co-workers whisper about how unnervingly behaved he's been and silently thank the poor anomaly that has captured his fixation. rather than talking down to them like he always does, he's been humming more lately and dismissing their comments with a happy grin. finally, they didn't have to deal with his overbearing attitude!

what they can't escape is the maniacal laughter that erupts every now and then from his laboratory. the laboratory which you've made your temporary home. you spend your time splashing around the rather big aquarium that the scientist has moved in for you, humming to yourself as you watch the scientist mess with his weird appliances. he's always talking to you, in the human language that you don't understand, but you can understand tones. and judging by his fast-paced syllables and wide grin, you think he's happy enough.

YANDERE! SCIENTIST, however, has gone on another tangent about how sublime your natural physiology is. he laments about how weak the human body is, and how you will be the key to developing their society. you think he must really like you, with how he often touches you. his touches often go from delicate caressing of your cheeks or perverse groping of your muscles and arms.

sometimes, he has you splayed out on his operating table, bright medical lamps pointed to you so he can observe your beautiful body in all its glory. you're wayyy bigger than him, so he has to straddle you so he can get a feel— ahem, gather accurate data on you... nevermind his intense blush and heavy breathing.

when you let out a questioning hum, yuri finally stops his roaming hands and snaps out of his trance. clearing his throat, he backs up and composes himself as he tries to get a semblance of composure. not that it matters, when you clearly don't care, but still.

"ahem! apologies, i was just, uh, your body was just too— i mean, i was busy gathering data on you, like always." he coughs into his hand, blushing as he steals another peek at your physique. "anyways, what is it? what brought you to disturb my information gathering, hm?"

you tilt your head and point to the clipboard he's always writing in, then to yourself. you're not stupid, but you don't quite understand why yuri needs so much information on your body. he furrows your brows as he tries to interpret your miming, before letting out an 'ah'. "oh, so you're wondering what i'll be using this data for?"

"as i've said before, humanity's evolutionary gene has fallen into a state of decline. an anomaly such as yourself with an advanced physiology will be able to help humanity with this. of course, this is all a hypothesis, so we'll be doing many rounds of... testing before we can actually proceed with this." yuri must've forgotten that you can't speak the human tongue, so when he sees the blank look on your face, he sighs.

"you."

trailing his fingers over your chest, they glide against the muscle before pressing against your chin, then point to himself with the other finger.

"and me."

his face takes on a sensual grin, biting his lip as his eyes lock with your confused ones. together, he brings his hands together, motioning one finger to enter the hole of the others.

"crossbreeding, yeah?"

... even you can understand such a universal signal, as you finally feel your face heat up at yuri's lewd provocation. the scientist, on the other hand, feels delighted when you finally understand his goal, mound squished against your taut skin slicking a bit when he feels you stir behind him.

MWAHAHAHAH once again i have fooled you into thinking this is a general yan fic. check out this guy at the game tokyo debunker, which has a really cool horror plot and cuter men. the storys really good my guys, so go check it out

[neil-gaiman]

Did you know that whale sharks have tiny teeth in their eyes :)

I didn't. I do now. Amazing. Thank you!

[requinoesis]

Alternative version for shark experts!🦈✨

Sharks' skin is covered with tiny denticles, unlike fish scales, they are made of the same material as our teeth! Then it is the denticles that would be painted to form your tattoos. But over time, the teeth fall out and your tattoos are left with “dead pixels” that are touched up with a revisit to the tattoo artist!

and In this sketch I wanted to explore that Luna also made some shooting stars on Rocky's back too!🌠

⭐An additional curiosity:

Each species of shark has a unique denticle design! They also have alternative designs on different parts of their bodies.

⭐This interesting video sums up a bit about the unique skin of sharks!

[crimson-catalyst]

i also love dying on any hill AND have a staggering array of bird facts 😌

Sometimes i wonder if my followers have their own “headcanon voice” for me

[bestanimal]

Round 1 - Phylum Chordata

(Sources - 1, 2, 3, 4)

Chordata is a phylum consisting of bilaterial animals that have, at at least some point in their development, a notochord and a dorsal nerve chord. It consists of the Cephalochordates (lancelets), Tunicates (sea squirts, salps, and larvaceans), and Vertebrates.

Vertebrates replace their notochord with a spine in early development, while tunicates only retain their notochord and dorsal nerve chord during their larval stage. Vertebrates and tunicates are more closely related to each other than they are to lancelets (first image), which are fish-shaped filter-feeders. They typically inhabit the sea floor, burrowing the bottom halves of their bodies into soft substrate. They have gill slits, but these are used for feeding on plankton rather than respiration. They have light-sensing organs, and one frontal eye. They do not have hearts or brains. They have two sexes, though hermaphroditism has been observed, as well as at least one instance of a lab-raised female transforming into a male. They breed by releasing eggs and sperm into the water synchronously. Larvae are asymmetrical, with the mouth and anus on the left side, and the gill slits on the right side.

Most tunicates are also filter-feeders, ranging from the sessile, sponge-like sea quirts (second image) to the planktonic salps. All tunicates start life as free-swimming, tadpole-like larvae with rudimentary brains and light sensors, before they metamorphize into their adult forms. Meanwhile, the larvaceans retain tadpole-like shapes and active swimming all their lives. Salps move by contracting, similarly to jellyfish, straining phytoplankton from the water. They have a complex life cycle, in which one generation of solitary individuals reproduces asexually by producing a chain of tens to hundreds of individuals, which are released from the parent at a small size. The next generation consists of a colony of salps (called blastozooids) remaining attached together while swimming, feeding, and growing. This generation reproduces sexually, first maturing as females and later transforming into males. Older chains of male blastozooids will fertilize the eggs of younger female chains. Growing embryos are called oozooids, and eventually detach from their parent blastozoids, to feed and grow as the next solitary, asexual generation. Meanwhile, some species of sea squirt live as solitary individuals, while others replicate by budding and become colonies of zooids. They are filter feeders with two tubular openings, called siphons, through which they draw in and expel water.

The most simple vertebrates are hagfish, which have a skull but no vertebral column. They are marine predators and scavengers who can defend themselves against larger predators by releasing copious amounts of slime from mucous glands in their skin.

Lampreys have an ambiguous position in the vertebrate tree of life, bearing a complete braincase and rudimentary vertebrae. They spend the majority of their life as filter-feeders. A small handful of species are known to be carnivorous as adults, boring into other fish to consume flesh and/or blood.

Chondrichthyes (“cartilaginous fish”) have skeletons composed mainly of cartilage. They breath through gills but lack opercula (gill coverings). They have internal fertilization and some species lay eggs while others give live birth. Chondrichthyans have tooth-like scales called dermal denticles or placoid scales. These usually provide protection, and in most cases, streamlining. Today, chondrichthyans are represented by sharks, rays, skates, sawfish, and chimaeras. All species are carnivores, though at least one species is omnivorous.

The majority of chordate species are Actinopterygians (“Ray-finned Fishes”). They are so called because of their lightly built fins made of skin webbings supported by thin bony spines. They are the most abundant free-swimming aquatic animals and can be found almost anywhere there is water. They come in a vast majority of sizes, shapes, colors, and behaviors, from the 8 mm (0.3 in) long Paedocypris to the 11 m (36 ft) long Giant Oarfish (Regalecus glesne). In most actinopterygians, males and females exist and reproduce through external fertilization. However, some species utilize sequential hermaphroditism, in which they start life as females and convert to males at some point. In a few species, they start life as males and convert to females. Some species give live birth, and some species self-fertilise. Actinopterygians have feeding strategies ranging from predatory to grazing to filter-feeding.

And lastly, the Sarcopterygians (“Lobe-finned Fishes”), named for the prominent muscular limb buds (lobes) within their fins. They are represented by the coelacanths, lungfish, and tetrapods. The vast majority of the rest of chordate species are tetrapods, a terrestrial clade of sarcopterygians who evolved air-breathing using lungs. They are highly diverse, with a large variety of forms, biological strategies, and ecological roles. Along with arthropods, they are the only other group of animals to have adapted to life in dry environments, and the majority of them live on land.

Chordata is one of the largest phyla of animals when it comes to species and is also one of the oldest phyla, known from as early as the Cambrian explosion.

Propaganda under the cut:

Lancelets naturally express green fluorescent proteins. They may use this green fluorescence to attract plankton towards their mouths.

Mentioned briefly above, the Bonnethead Shark (Sphyrna tiburo), a small species of hammerhead, is the only shark known to be omnivorous. While it feeds on crustaceans, molluscs, and small fish, it also ingests large amounts of seagrass, which has been found to make up around 62% of gut content mass.

The Mangrove Rivulus (Kryptolebias marmoratus), a species of killifish, mostly breeds by self-fertilization and can survive for about two months on land. Males are rare, and can only hatch from eggs kept below 19 °C (66 °F).

The largest chordate is the Blue Whale (Balaenoptera musculus), which can reach a maximum confirmed length of 29.9 m (98 ft) and weigh up to 196 long tons; 219 short tons). While it’s not the longest, it is the largest animal known to have ever existed.

At least one of your favorite animals is probably in this phylum. Most of the animals people keep as pets are in this phylum. We are in this phylum.

I am tired, and there is no way I can write enough propaganda for this poll, so I trust you can supply your own.