todropscience:

BONNETHEAD IS AN OMNIVORE SHARK, RESEARCHERS FOUND

What an animal consumes and what an animal digests and assimilates for energetic demands are not always synonymous. Sharks, accepted as carnivores, have guts that are presumed to be well suited for a high-protein diet. However, the bonnethead shark (Sphyrna tiburo), an abundant shark commonly found in seagrass habitats, has been previously shown to consume copious amounts of seagrass, flowering marine plant that forms subsea meadows in some coastal waters in the Gulf of Mexico, as in other parts of the world. And now, is considered the first known plant-eating shark. The finding were published in the journal Proceedings of the Royal Society.

The bonnethead shark is an abundant shark species in shallow waters of the Eastern Pacific, the Western Atlantic, and the Gulf of Mexico, where they feed on seagrass and small crustaceans, snails and other fishes, and according to researchers, in natural conditions, up to 62.1% of gut content mass is seagrass. Because a large percentage of the diet is seagrass, conserving seagrass beds is vital to the hammerhead shark family and other marine life.

wait when you say its safer to dive w sharks than to dive w cetaceans are you talking abt orcas as well? could you go further into that? sorry if this is a dumb question !!

why-animals-do-the-thing:

I want to clarify that the statement was about wild cetaceans and wild sharks. I was mostly thinking about wild bottlenose dolphins when I stated that, because they’re what everyone wants to swim with, but it can also apply to pretty much any marine mammal. (And yes, I know killer whales are dolphins). 

I’m hesitant to say anything about if swimming with wild orcas is “safe” of “unsafe” because there’s actually a ton of weird history behind how western culture viewed / views them as a species. In the 1950′s we literally thought of them as monsters that would eat people alive and supported killing them en mass – it wasn’t until the first one was accidentally captured (instead of killed) and brought into an aquarium setting that the public mentality shifted to wild orcas being “sweet puppies that would never ever hurt a human being ~uwu~”. Reality is likely somewhere in between.

But, think about it this way: all cetaceans, including orcas, are large, powerful, highly intelligent mammals. Sharks are fairly prehistoric fish that – while they can be smart – exhibit less behaviors indicative of complex cognition. Sharks get a bad rap because they investigate everything with their unfortunately toothy mouth, but cetaceans are also really well known for fucking with people and things. Bottlenose dolphins get the worst reputation for like, having sex with literally everything, but some killer whale populations also tear apart baby whales and then play with their eyeballs. 

If I had to pick one wild animal to be more comfortable sharing water with, it would be a shark over any cetacean, no matter the species.  

Same. I don’t trust marine mammals at all. Sea lions are way bigger and faster than me, so even they make me a bit uneasy. Even male sea otters are nasty, nasty little creatures, worse than dolphins in the “having sex with everything” department. You don’t want to know. 

Marine mammals make me nervous because they’re unpredictable and have no reason not to mess with me. Sharks, as potentially deadly as some are, are largely predictable and also largely uninterested in humans. 

I’ve been snorkeling near wild sea lions, and I’ve encountered a leopard shark of roughly the same length, and I can tell you right now I would much rather meet the leopard shark again. It was fast, sure, but had absolutely no interest in me or anyone else. It just wanted to eat fish. The sea lions were checking out every single diver, and, though they were mostly focused on eating the squid (night dive, lights, lots of small squid), they were definitely interested.

That’s not all marine mammals, though. Baleen whales are chill and might not even notice you if you don’t get close. I’ve seen monk seals, and they also seem pretty calm. I wouldn’t try to get close to them, but I wouldn’t actively avoid any water containing them. 

I’m not actively afraid of sharks. If I saw a large one while diving, I’d keep my eyes on it, but I wouldn’t try to leave unless it was getting way too close. Dolphins, on the other hand, I’d start trying to avoid as soon as they were within my vision. They make me uneasy. 

I’m not saying you should be afraid of marine mammals like people are afraid of sharks. I’m saying they’re wild, unpredictable animals, stronger and faster than you, that like to mess with things. I’m also saying you should not go and pet them. 

bunjywunjy:

piwnymisiek:

praazlwurm:

pazdispenser:

dimetrodone:

dietmountainmadewka:

zahnegott:

dimetrodone:

Most of our perception of what Goblin sharks looks like comes from dead specimines where they are all mangled and shrivelled, and are always positioned with their jaws protruding out.

When while alive they only ever extend their jaw for feeding, and arnt half as creepy looking

they do look like goblins

this also disregards the fact that they can still propel their jaws forward like an aquatic xenomorph from hell

So can many other fish, I’m just not judging them for their beautiful smile.

personal favourite

why is the ocean like this

what a question

that’s just what ocean is like

if it skulks on a reef, and has two sets of teeth,

that’s a Moray.

gem-under-the-mountain:

aviewfrommercury:

bene-geserit:

galesofnovember:

wild-guy:

“In a performance protest against the Australian shark cull and the global slaughter of sharks, a woman risks it all to dance on the sea floor with swarms of tiger sharks up to 17 feet long without any dive or protective gear.” (x)

The woman in the video is Hannah Fraser, and yes, it’s real.  Hannah Fraser is a professional mermaid/free-diver who does shit like this all the time

YOOOOOOO.

I’m not saying I have a mad-crush on this amazing shark-mermaid-lady, but I have a mad-crush on this amazing shark-mermaid-lady.

This is great but she’s not “risking it all”. The entire fucking point is that she’s not risking it all. Those sharks are HARMLESS and dont care about humans at all. As you can see, they’re totally chill with her being there. And as a pro-diver/mermaid she’s fully trained to free dive without equipment.

The reason this is such an effective protest is because it proves that tiger sharks aren’t interested in harming humans. And that they’re actually quite gentle even. So please, for Hannah Fraser, stop putting this shark-scare bullshit on images of her when that’s literally what she’s fighting with this performance.

They’re not harmless. They can cause serious damage. They aren’t aggressive, but that doesn’t make them harmless. That isn’t a 100% safe thing to do, partly because of the lack of equipment other than a weight, partly because of the sharks. 

Do NOT touch wild sharks. If you startle one and it whips around and bites you, you will be badly injured, potentially permanently maimed or killed. 

Large sharks are not harmless. They are also not vicious. They are large, predatory wild animals who test things they’re curious about by biting them. Tiger sharks in particular will eat almost anything. If one of those sharks decided to bite her, she would be in serious trouble before anyone could get to her, even if it was just a curious nip. 

Yes, the chance of being bitten by a shark is extremely low, but the potential harm is great enough that you should avoid doing things that increase your risk of a bite. Don’t swim at night, don’t swim while bleeding, etc. Also, don’t do this.

I admire what she’s doing, and she’s right, sharks aren’t violent monsters, but this is not something that the average person should go out and do. You wouldn’t go up to a wild panther, I hope, so don’t do the same with a shark. Heck, you shouldn’t go up to any large wild animal, or most wild animals, period. You especially shouldn’t surround yourself with them and touch them. 

portmanteau-bot:

elodieunderglass:

mia7437:

chibicheesepuff:

chibicheesepuff:

chibicheesepuff:

chibicheesepuff:

i made some sharks im bored hhhhh

people really like these boys huh?

I made more because i have no self control

hey.

i got a surprise for you

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@elodieunderglass a blessed thing with legs

that’s uhhhhhhhhhh

thats + uhhhhhhhhhh = thuhhhhhhhhhh.


Beep-boop. Portmanteau^bot^1

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Biofluorescent Marine Animals

dynamicoceans:

Animals may use florescence for may different reasons. 

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This bream may use it’s fluorescence to camouflage itself among coral, as it is just as intense as the coral behind it.

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The lined seahorse may use it for camouflage or for their elaborate mating rituals.

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In sharks it may be used to distinguish between male and female sharks.

The video for this is pretty neat, if you have about 15 minutes of spare time, I highly recommend watching it.

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