#smalltooth sawfish

[antiqueanimals]

Marbled electric ray (Torpedo marmorata), Smalltooth sawfish (Pristis pectinata)

Fishes of the World. Written by Hans Hvass. Illustrated by Wilhelm Eigener. Originally published in 1964.

Internet Archive

[great-and-small]

Have some good news to help you celebrate this international sawfish day!

Sawfish are one of the most interesting fish ever to have lived and we are remarkably lucky to have them. Today (like all days) is the perfect time to talk about this amazing fish with your family and friends!

[propalitetz]

oh yeah smalltooth sawfish baby hell yeah hell yeah. i thought they were sharks since they're also called carpenter sharks.... turns out NOPE! RAYS!

[sordidamok]

Can't wait for Republicans to blame this on DEI.

[thatsleepymermaid]

So if you haven't heard the news there seems to be a mysterious die-off of small tooth sawfish in South Florida. Nobody's sure exactly what's causing it besides the abnormal spinning behaviors being related.

Luckily, this past week a sawfish was captured and relocated to a rehabilitation facility. In Thursday it recovered enough to be transported to Mote Marine Laboratory for study.

Unfortunately more than 30 deaths of the critically endangered sawfish has been reported and now over fifty species of elasmobranches are showing the same concerning behaviors. I'm interested in seeing where this goes in the future since the obvious suspects like bacterial disease and toxic blooms don't seem to be causing this.

[doesgodexist]

Smalltooth Sawfish “Pocket Protector”

An interesting creature lives in the ocean off southern Florida and the Bahamas. The smalltooth sawfish (Pristis pectinata) is a member of the ray family with a snout lined with needle-sharp teeth that it can use to cut vegetation or chop up a predator that gets too close. The amazing thing about this fish is that the babies are live-born. The question is how can a baby sawfish avoid cutting up…

[bethanythebogwitch]

Wet Beast Wednesday: sawfish

It's the first Wet Beast Wednesday of 2025 (yeah I missed last week, sue me) and I'm going to cover a fish I once saw. That's right, I saw a fish. A sawfish if you will. These besnouted beasts were once common worldwide, but now their range had shrunk considerably, leaving their future in question.

(Image: a largetooth sawfish, Pristis pristis, seen from above. It is a flattened, shark-shaped fish with light brown skin. From the front of the body extends a long, slat snout with teeth emerging from the sides. The snout is about a third the length of the body. The mouth and gills are not visible. End ID)

Sawfish are also called carpenter sharks, but they aren't sharks. Despite looking sharky enough, they're actually rays and are closely related to other not very ray-like rays like guitarfish and banjo rays. I don't know why they're so musical. Sawfish should also not be mistaken for the visually similar sawsharks of order Pristiophoriformes, which actually are sharks. There are five living species of sawfish in the family Pristidae: four species in the genus Pristis and one in the genus Anoxypristus. Sawfish look like sharks with flattened underbellies, but their mouths and gill slits being on the underside identified them as rays. The sawfish and their relatives may represent an ancestral form to most modern rays which are much flatter and more compact. What gives sawfish their names are the long, flat, and broad rostrums that extend from the front of their heads and are lined with teeth on either side, giving them a resemblance to carpentry saws. Sawfish are very large fish, with some being able to up to 7.5 meters (25 ft) long and 600 kg (1,323 lbs).

(Image: a smalltooth sawfish, Pristis pectinata, seen from the side. It looks very similar to the largetooth sawfish, but with smaller teeth on the saw. The flatness of the belly is clearly visible form this angle. The underside is white.)

The saw is an extension of the skull and the teeth that line the sides are heavily modified dermal denticles, the teeth like scales that sharks, skates, and rays have. The saws and teeth grow longer through the animal's life and lost teeth are not replaced, but do leave a socket, allowing an accurate count to be made. The saws are not perfectly symmetrical and one side will usually have 1-3 more teeth than the other. The two genera of the sawfish can be differentiated by their rostral teeth. The Pristis species have saws that have rounded teeth going down the entire length while Anoxypristis cuspidata, the narrow sawfish, has flattened teeth and the 1/4th of the saw closest to the head is toothless. A sawfish's saw usually makes up 1/4 to 1/3rd of their total length. Each species has slight differences with the structure of their saws, allowing for identification. The saw and head are covered in electroreceptive organs called ampullae of Lorenzini that detect the electrical fields emitted by animals as they move. This grants the sawfish extensive ability to examine their environments through their saws, which is highly useful for hunting and threat detection, especially in water with low visibility.

(image: somebody holding a juvenile sawfish so the saw pokes out of the water. The saw is the focus of the picture, making its shape and the rostral teeth clearly visible. End ID)

Unlike your average ray, sawfish have multiple distinct fins much more like a shark, lacking only the anal fin. Again, the ancestral ray was probably something like a sawfish or guitarfish. Some of its descendants would have retained its body plan while other became typical rays. Like other elasmobranchs, sawfish (except for the narrow sawfish) have dermal denticles for scales and lack a swim bladder, instead using a very fatty liver for buoyancy control. Like most rays, they do not use their mouths for respiration, instead drawing water into the oral cavity through spiracles located near the base of the saw. These spiracles allow the animal to continue to pass water through the gills even when the mouth is flat to the ground. The nostrils, gill slits, and mouth are located on the underside as well. The mouth has proper teeth, which are blunted and set in multiple rows that have been described at looking like a cobblestone road. These blunt teeth aid in crushing the shells of hard prey. As with many other elasmobranchs, the small intestine has a corkscrew-shaped structure called the spiral valve that increases the surface area, allowing for increased nutrient absorption.

(Image: a sawfishs head seen from below. The mouth is wide and roughly rectangular in shape, with rows of pebble-like teeth visible. Above the mouth are a pair of nostrils. End ID)

Sawfish were historically found in shallow, coastal waters in subtropical and tropical water worldwide, but their native range has been radically reduced. While primarily marine, they can tolerate brackish and even fresh water. The largetooth sawfish, Pristis pristis, is especially attuned to fresh water. They live in rivers and lakes for the first several years of their lives and have been found thousands of kilometers inland. Despite sailor's tales of sawfish cutting open the bellies of whales to feed on their entrails, the fish actually feed on small fish and invertebrates. The saw is used for both finding and obtaining food. By using smell and the electroreceptors covering the saw, the sawfish can seek out animals on or buried in the sediment. It uses the saw to strike prey animals, stunning or killing them. They are also known to pin prey down with the saw, something they also do to maneuver food into a more swallowable position. Sawfish may also use their saws to dig buried prey out by sweeping away layers of sediment. They prefer to live in places with soft sediment, though will also inhabit coral reefs.

(Image: a narrow sawfish, Anoxypristis cuspidata, being beasured. It looks like the other species, but its dorsal and tail fins are a much darker brown than the rest of its skin. The saw only has teeth on the last 2/3rds and the teeth are flatter and more triangular. End ID)

Like other elasmobranchs, sawfish reproduce internally. Males are believed to use their electroreceptors to locate mature females. The male bites onto the female's pectoral fin and inserts one of two penis-like claspers into her cloaca. Sperm runs down a groove in the clasper. Females are often left with scars from the male's teeth and saw. The smalltooth sawfish, Pristis pectinata, is capable of parthenogenesis, producing offspring without a mate, and other species may also be capable of doing this. This allows females to reproduce even if they cannot access a male, but means all offspring will be female and genetically extremely similar to the mother. Sawfish are ovoviviparous, meaning they retain their eggs, which hatch internally, and give live birth. The fetal offspring are nourished with a yolk sac before being born. The saw is soft in fetu, hardening shortly before birth, and is covered with a coating to protect the mother which falls off after birth. Gestation takes months Juveniles are born in litters numbering between 1 and 20. Newborns can be up to a meter long. Females appear to mate between once a year and once every two years and mothers will sometimes return to their place of birth to give birth. Pupping grounds are always in shallow coastal or estuarine waters. Sawfish mature slowly. The narrow sawfish reaches sevual maturity after 4.5 years and the Pristis sawfish between 14 and 17 years. Their maximum lifespan is unknown, but Pristis individuals in captivity have lived for decades, leading to an estimated lifespan of 30 to 50 years. The narrow sawfish lives for around 9 years.

(Image: a photo from the first human-assisted birth of a wild sawfish. The mother is on her back and a juvenile sawfish is almost completely emerged from her cloaca, with only the tail fin still inside. The hand of a scientist is touching the baby, helping it emerge. End ID. Source)

(image: a newborn sawfish being held in a human hand underwater, from the same incident as the above photo. The newborn looks like a miniature adult and has a soft covering over its saw that makes the teeth harder to see. It is small enough to be partially clenched in a hand. End ID)

All species of sawfish are classified as critically endangered by the IUCN and they are considered some of the most threatened groups of fish. While sawfish were formerly found along the coasts of 90 countries, their nange has reduced considerably so the only strongholds where they are abundant and have a genetically viable population are now found in northern Australia and Florida. The main threats to sawfish are hunting and habitat loss. Sawfish are hunted for their fins, saws, and meat. Despite not being sharks, their fins are highly values for shark fin soup. Sawfish body parts are used in traditional medicine in multiple cultures, though the greatest demand comes from China. There is no evidence backing up the effectiveness of any of these traditional medicines. The saws have historically been used as weapons, combs, and for various symbolic purposes and poaching of sawfish for their saws is another major threat to their survival. The saws are easily tangled in nets, making sawfish easy to catch and difficult to release. Because a thrashing sawfish can seriously wound someone, many anglers will either kill the fish or cut off the saw if they accidentally catch one. Habitat loss is another large threat, as pollution and destruction of seagrass beds and mangroves for urban developments deprives them of the habitat they need to hunt and breed. Because sawfish mature so slowly, it takes a long time foe populations to recover. Legal measures (including making international trade of sawfish parts illegal) and public outreach via scientists and aquariums aim to help protect the remaining populations. Unfortunately, captive breeding has proven unreliable as it is only recently that sawfish have been successfully bred in aquariums.

(Image: a decorative sword made from a sawfish saw. The saw is dried and a deep brown. It is attached to a curving crossguard and a long hilt with fluffy decorations. It is being stored in a museum display. End ID)

[incorrectbatfam]

Stephanie: As an empath, there are many bony fish species I can't make eye contact with because their emotions flood my brain at such high pressure it gives me nosebleeds but cartilaginous fish are no problem as 700 years ago I was a smalltooth sawfish.

Tim: None of these words are in the Torah.

Stephanie: I know they got fish in the Torah.

[incorrect-hs-quotes]

KANAYA: As An Empath There Are Many Bony Fish Species I Can't Make Eye Contact With Because Their Emotions Flood My Brain At Such High Pressure It Gives Me Nosebleeds But Cartilaginous Fish Are No Problem As 700 Years Ago I Was A Smalltooth Sawfish

ROSE: None of these words are in the Torah.

KANAYA: I Know They Got Fish In The Torah

[dailymarinefish]

day 135, 10/06/24 - fish of the day is the smalltooth sawfish (Pristis pectinata)

[phewkitten]

Some shark species have been known to reproduce via a virgin birth – a process known as parthenogenesis. This was recently observed in the critically endangered smalltooth sawfish. It occurs when females fertilise themselves with material that splits off from an egg as it divides, but then fuses back with the egg. Some sharks have also been known to eat their siblings in the womb. The fastest-growing embryos will feast on the yolk sacs and embryos of their less developed brothers and sisters.

[currentclimate]

soaring temperatures that reduce the amount of oxygen in the water.

[nagito-komaeda428]

MMMMMNNHHH,M

We invite Hajime when tent finish and

Ppelt him with smalltooth sawfish

Hm... maybe we could invite him to the tent with us and be kind to him instead.

[incorrect-darkside-detective]

Dooley: As an empath, there are many bony fish species I can't make eye contact with because their emotions flood my brain at such high pressure it gives me nosebleeds but cartilaginous fish are no problem as 700 years ago I was a smalltooth sawfish.

McQueen: None of these words are in the Bible.

Dooley: I know they got fish in the Bible.