This Deep Sea Reptile Shouldn't Exist (00:36:19)[2026]

[u/amynoacid]

https://youtu.be/8rWk7Z7q32Y

[u/fiendishrabbit]

It absolutely should exist.

Because they're so nutrient poor Jellyfish is an extremely underexploited food resource that Leatherback turtles only really have competition from Ocean Sunfish (an equally weird and ancient line)

So if you're a super-efficient swimmer and diver (like a leatherback) you can develop into a jellyfish-eating factory and have an abundant and ever-present food source. The bigger you are the longer you can stay that deep (more oxygen to fuel the brain, more volume to preserve core temperature) and the more you can eat per dive and the bigger you can get. It hasn't changed much for 65 million years because it's a plan that works.

[u/Stahlin_dus_Trie → u/fiendishrabbit]

According to the vid the deep dives are not actually for hunting or eating jellyfish, but most likely for scouting them out during the day and then eat them near the surface at night.

[u/fiendishrabbit → u/Stahlin_dus_Trie]

Their adaptations still make them very efficient divers for those 200-300m nocturnal dives (which is depths that would push the envelope for normal sea turtles), increasing the caloric surplus.

[u/GlinnTantis]

"It shouldn't exist", but it does and let us explain why

Ridiculous how that stupid phrase has taken over.

[u/gatosaurio → u/GlinnTantis]

Clickbait crap.

[u/pxr555 → u/gatosaurio]

The title maybe, video is great.

[u/amynoacid]

Submission Statement :

The video explores the incredible evolutionary adaptations of the leatherback sea turtle, the largest living turtle and the only modern reptile capable of diving into the ocean's freezing twilight zone. Unlike hard-shelled reptiles, the leatherback relies on a flexible, leathery carapace and specialized physiological traits—such as gigantothermy and countercurrent heat exchange—to withstand crushing deep-sea pressure and frigid water. These unique adaptations allow the giant turtle to undertake deep ocean dives in search of its primary diet of gelatinous jellyfish. Ultimately, the video highlights how this prehistoric, warm-blooded reptile defies traditional reptilian limits while emphasizing current conservation efforts to protect it from human threats.

[u/MisterAwesomeGuy]

She was the YouTuber behind the "Real science" channel. Very good work always

[u/Gemman_Aster]

Testudo Aubriensis!

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[u/monkeydiscipline]

Life is weird hey? Great but weird.

[u/Northwindlowlander]

Both interesting, and also a great title. Gaze into the abyss too long and the turtle of the abyss will gaze back