#bull shark

[t00thpasteface]

54 common fish of texas, part 1: bull shark (Carcharinus leucas), atlantic sharpnose shark (Rhizoprinodon terraenovae), scalloped hammerhead (Sphyrna lewini)

[feelingautistic]

Bull sharks are one of the only sharks that are diadromous, meaning they can swim in both salt water and fresh water.

[tryintheirbest]

reblog for bigger sample size :)

[kasttt]

bull shark!! look at this silly guy

[durasposts]

[megabyste]

Priorities

[oatslemonade]

I love how large Leviathan Kraken Nightmare is. He makes all of the Shiver look like tiny Bitty Bones.

[artofsoul1999]

Three sharks that I have illustrated:

The bull shark, Caribbean reef shark, and sand bar shark.

Yes, I love sharks too! Cetaceans are honestly a gateway into loving other marine animals, and for me, it just happened to be their fishy counterparts. As for which species is my favorite, well, there are two, and so far, I illustrated one of them, which is the bull shark.

[krakenandcracker]

some shark sketches by me

[catnoli]

carrd | faq | ko-fi | shop

bull shark barbarian!! also a zombie! half dead half alive…still raging!

[t00thpasteface]

favorite shark?

BULL SHARKS!

they have a remarkable tolerance for variable water salinity, so even though they typically live in the ocean in warm coastal waters, they can easily swim upstream to hunt in brackish and even fresh water. they've been sighted at several different points all the way up the mississippi, and show up in basically any bay and estuary in texas, along with many different local rivers, sometimes several miles from the shore. sometimes hurricane floods and storm surges will strand them in otherwise isolated lakes.

when i was a kid and found out about that, i was CONVINCED from that point on that ANY natural body of water in texas not only could, but did have At Least One Bull Shark in it. because, theoretically, under the right circumstances, there really was a nonzero chance that a bull shark was in there. now i love them for the exact same reason. it's a really fascinating adaptation!

basically, the bull shark can do this because its excretory system can adjust what it's excreting depending on what the shark is drinking/absorbing in the current environment.

in a very simplified explanation: freshwater fish excrete large amounts of dilute urine, but retain salts; saltwater fish excrete large amounts of ions in very concentrated urine to retain as much water as possible while constantly drinking/absorbing water as they swim. other relevant factors include the permeability of the skin to water and ions, the absorbtion of water directly into the bloodstream via the gills, and the naturally "salty" urea-heavy blood present in shark circulatory systems.

this process is called osmoregulation— controlling the proportion of water and solvents as they move in and out of the body— and involves the kidneys and liver, as in humans, as well as a special excretory organ called the rectal gland, which is unique to sharks. the kidneys, liver, gills, and rectal gland of the bull shark all modify their absorption, secretion, and reuptake of water and ions as the shark moves into lower salinities that would easily kill any other shark.

also...... they're chumky

[shark-a-day]

Todays shark is...

The Bull Shark!

Fun Fact: The Bull Shark is a migrating shark that goes north in the summer and south when it gets colder, and they are capable of covering 180km in 24 hours and can move between fresh and saltwaters and will!

[shapesenthusiastz]

You expected no requests BUT IT WAS ME DIO- jk

anyways here’s a for fun drawing request cause yeah

Dipper scuba diving alongside the Bull Shark Pup aka the shark protagonist from the Game Maneater

while Mabel is snorkelling underwater and petting the Bull Shark Pup and both sharing a chaotic wholesome brain cell 🤿🦈🫧

Aaaa Im so sorry I realized that u said scuba diving for Dipper instead of snorkeling after i finished drawing😭😭 but other than that, this one was fun to draw, i loved Dipper's facial expression lmaoo. Tq for the request and sorry for the mistakes </3

[auggies-dreamworld]

guys im autistic and im making a powerpoint on sharks (my dumb depression got in the way of me finishing it months ago and im restarting it)

pick a shark for me to write on! im doing whale sharks first bc theyre my babies but pick my second!

[respect-the-locals]

*Not mine, found on Facebook. There was no artist there either.*

[catfindr]