The Greta Thunberg of fish species.

Snailfish like this Careproctus longifilis are flabby, scaleless fishes with tadpole-like bodies, broad fins, and tiny tails. Well-adapted to a variety of deep-sea habitats—including rocky outcrops, the muddy seafloor, and the midwater—they are a diverse and thriving group with over 400 described species.⁣