Leo

18 year old scholar interested in marine biology!

[detailedart]

Bottle green details: Rolling Waves. Painter: Constantin Westchiloff (1877-1945).

[chilirasbora]

Starry-smooth hound | Mustelus asterias

Photo credit: x

[pixelartpeach]

This is how it works right

Keep reading

[requinoesis]

Day 31 - Shark Halloween

As in tradition, children play ancestral melodies and carry the symbol of the night to soothe stray spirits during their trick-or-treating journey!🌙✨

[speleothem]

[angel-kiyoss]

Octopus filmed changing colours while sleeping.

[fierceawakening]

i wonder what they are dreaming about

[plum-soup]

Changing colors duh

[max1461]

What’s really cool about this is that cephalopod (octopus, squid, etc.) intelligence evolved completely separately from intelligence in tetrapods (which includes primates, dolphins, crows… basically any other intelligent animals you can think of). Cephalopods are very, very far away from us on the tree of life. For context, you and a starfish are more closely related than you and an octopus. The last common ancestor of humans and cephalopods was the so-called Urbilaterian, the hypothetical first animal with a left-right symmetric body. This animal almost certainly had, at most, an extremely simple nervous system, without anything resembling a brain.

All this is to say that the fact that this octopus appears to be dreaming means one of two things. Either

a) dreaming is a very, very old thing indeed, going directly back to the Urbilaterian. This would mean that almost every animal, from insects to starfish to sea slugs to newts, is likely to have the ability to dream in some capacity or another (unless they have specifically lost it by evolutionary simplification).

or

b) dreaming evolved entirely independently in cephalopods when they developed greater intelligence. This would suggest, at least, that there’s something very fundamental about dreaming related to intelligence itself, which causes it to emerge independently when sufficient intelligence arises.

Needless to say, either of these outcomes would be really very cool.

[photographss-world]

Ne zamandı kuşların yüreği havalandırması

ne zamandı gökyüzünün bir kucak gibi bastırması bizi içine.?

Bejan Matur...

[sea2019life]

Spotted Eagle Ray - Bermudian Magazine.

[oceaniatropics]

Pink Manta Ray, Great Barrier Reef, Queensland, Australia

[lijanaa]

with ℒℴѵℯ

[porcoboia66]

P.

[gogogy-deactivated20221021]

Climbs through the hole in the ceiling I made yesterday to show you the next cool critter

Thresher shark (fox shark)

This weirdly proportioned shark lives across all different kinds of oceans, but prefers tropical waters.

(Yes this weirdo actually exists)

As you can see, about half of their whole body length is literally just the the elongated part of their upper fin. The biggest of em can be up to 6m long, so that 3 m of pure fin.

They use this strange adaptation to hunt herrings and anchovies. How you ask ? By swing it forward in a whip-like fashion and incapacitating their prey, obviously :D

They're also one of the few sharks, that have been seen breaching the water and jumping high up in the air, using of course their tail to propel them forward (though I don't know why exactly they do that)

They are seen as a challenge to fishermen and hunted for their fins, meat and liver. Due to their long gestation period (they are slow to reproduce) their population can't handle heavy fishing pressure for long. As of right now, they are classified by the World Conservation Union as vulnerable for extinction.

Cheers !

OH I LOVE THIS SHARK

their tail doesn't even need to directly come into contact with their prey to do damage — even just the force of the current made from the slap is enough to stun or kill

[babylon-crashing]

When I dream of free-diving with sharks this is what I imagine.

[sea2019life]

[oceanuscreature]

Look at this chunky fella

[injuries-in-dust]

Source: Instagram

[pissbunn]

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[bogleech]

They’re also chordates, like us vertebrates! Their embryos have basically the same anatomy as ours, but the notochord, the part that becomes our spinal column, just remains a notochord until they’re ready to become a jelly bag forever. Then they digest the notochord as well as their own brain because they won’t need either of them.

[totallynotagentphilcoulson]

So fucking jealous right now these little bastards get to just live their best life meanwhile I gotta drive 40 miles to work each morning and pay taxes

[melodyofthevoid]

:O

[artimu5-is-odd]

[lavender-melancholy]

Amphiprioninae

[sea2019life]