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Ive been in fishbrain mode recently so I am here to tell you about one of my favorite deep-sea fish!
This guy is the barreleye fish (Macropinna microstoma), and it's got one of the weirdest eye adaptations out there--probably even weirder than the strawberry squid! Those little gray things that look like its eyes are actually its olfactory organs (basically fish nostrils); the weird green orbs you can see through the top of its head are its real eyes!
Absolute freak. Absolute CREATURE.
The purpose of this weirdass adaptation is actually very similar to the Histioteuthis' weird eyes (explained here); while Histioteuthis squids swim sideways with one eye looking up and one looking down, barreleye fish can ROTATE THEIR EYES IN THEIR FUCKING HEAD. THEY CAN LOOK FORWARDS OR UP BECAUSE THEY CAN ROTATE THEIR FUCKING EYES NINETY DEGREES. IN THEIR CLEAR FUCKING HEAD DOME.
Ok. I will be normal now. The consequence of them having a clear head is that their entire brain is visible; not exposed to the water outside, but apparently you can see it if you can distinguish it from all the other stuff in there. The dome is full of fluid, which keeps it from collapsing in the enormous pressure of their environment--these fish have been spotted from 2,000 feet (600 meters) to 2,600 feet (800 meters). While little is known about their diet, MBARI researchers Bruce Robinson and Kim Reisenbichler have observed barreleye fish rotating their eyes forwards to eat small fish and jellyfish, and Robinson speculated that they may steal food from siphonophores (which are even weirder animals--I'll post about them later).
Here's my favorite part about these fuckers, though: they're only six inches long!! when I first learned about them I assumed they were big guys but no!!! They're six inches long!!!!!!
More information on these guys can be found here (MBARI article about the fish) and here (short video narrated by Bruce Robinson) (Yes both of these are MBARI sources but they genuinely lead the world in deep-sea research and are great at making their information acessible; you should definitely check them out and, if you live in California, consider visiting the monterey bay aquarium!)
Ocean!!! Hello!!! I love seeing all of your ideas, you’re honestly super creative and it’s just downright inspiring. I love how you’re always trying to strengthen our community, and I’m here to tell you it’s worked. Thank you so much for everything you’ve done for this fandom, you’re amazing Ocean 🫶🫶