I looked it up once if they really haven't changed at all since the earliest fossils, and they actually have - just not by very much.
this post was submitted on 06 May 2026
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Oh dear god. I've never bothered to read much into the anatomy of horseshoe crabs until today, and I had no idea they have an array of photoreceptors along their telson (the long, tail-like segment). That's so creepy.
there's something about non-fishy, non-mammalian sea creatures that makes them have photoreceptors fucking everywhere. look at starfish or some octopuses for example. or any other genus really
Eyes on thier tail? Nature be cray
I looked up to see how these suckers taste, and they're actually pretty gross looking inside, idk I'm adventurous but I think I may have found my limit
They're used a lot for industry medicine. Thier blood is harvested and then theyre released.
So you might have already had a taste!
These are the ones with the blue blood? I remember seeing a video on it. They hook them up suck some blood out and put them back.
Don't they die from this anyway?
No, they retire to a nice aquarium upstate.
I'm sure some do
Why bother? I'll just end up re-carcinizing later.
Horseshoe crabs got it alllll figured out.
and didn't even need a cortex to do so