Hi, you know what keeps me up at night? This thing I learned about in Comparative Vertebrate Anatomy last year. I'm not even a marine biology bitch but every month or so I think about it and can't stop. Now just a reminder that I'm no expert, this is purely based on what I learned in class and then obsessively on my own.
Okay so during the Devonian period, there was this fish. Not even a fish. Like, a monster fish.
It's called the Dunkleosteus, and this shit terrifies me for a specific reason.
So it's significant in vert anatomy because it was one of the first bony headed fishes, like it had its own head shield that functioned as self sharpening teeth--was a placoderm, literally an "armored fish." You can find the skull on google, it's pretty cool. It was over 30 feet long and weighed over 3 tons and was the APEX predator at the time. Like it was the top of the top. It's kinda skull-mostly teeth could exert 8,000 square pounds of force (sharks were basically fish to this thing.) It's claimed to be the first vertebrate that could shatter its prey before ingesting it, and its jaws could open in 1/50th of a second, which pretty much creates a vacuum drawing prey right in.
And I'm sure you're like, okay cool rant Anna, so what?
But here's the real thing that terrifies me--it just went extinct out of NOWHERE. How on earth does an apex predator that has literally every evolutionary advantage going for it just disappear?
There are two leading theories--1.) Dunkleboi was a species that showed cannibalistic tendencies, so there's that ig. 2.) dropping oxygen levels in the ocean at that time may not have allowed something so large to survive.
However, my big thing, and maybe it's because I'm a paranoid bitch, is that its sudden disappearance only points to the fact that there was probably something way bigger and scarier at the bottom of the ocean that we haven't discovered.
I can't wait until we can explore the bottom of the ocean more because it's so cool yet also terrifying.
Anywho, that's all from me folks. I just think about the Dunkleosteus a lot.















