I’ve been a animals nerd for over three decades and sometimes I’m still just stunned speechless by the existence of an animal I didn’t know about

pagurus:

bogleech:

THIS IS GENUS PHYLLIROE.

IT EVOLVED JUST LIKE A FISH.

IT’S A GENUS OF SLUG.

So I did a post about these a while back, but here’s the main thing that I think is of major interest!

These nudibranchs attach themselves to a species of jellyfish in their larval stage, feeding on the bell, eventually outgrowing the jellyfish, consuming the tentacles of the host and then swimming away to carry on its life.

So not only are they free swimming, fish-like slugs, they’re parasitoids as well!