But they still pack a punch, so maybe don’t say that to their face.
Mantis shrimp are pretty much the world's coolest crustaceans.
Video Courtesy Roy L Caldwell
Don't be fooled by their tiny arms: a mantis shrimp could punch you at a speed of 80 kilometres per hour if it wanted to.
That's the same acceleration as a .22 calibre bullet.
Image courtesy of Roy L Caldwell
Just look at this one destroy a clam.
Oh and they can also catch fish.
Image courtesy Roy L Caldwell