Really?Morm: I think you're referring to the pistol shrimp.
wikipedia said:Although it happens rarely, some larger species of mantis shrimp are capable of breaking through aquarium glass with a single strike from this weapon.[5]
It looks like a brown Walrein
Maggot under an electron microscope (switches between "oh my god that thing has fangs" and "awww, it has a durrr face")