Most reef aquarists include some sort of hermit crabs to eat algae, scavenge for leftover food, etc.
Over the years I had many different kinds.
Currently I have some of these guys, but I have no idea what their exact species name is, perhaps someone will recognize it from the picture.
Hermit crab.
They were smaller when I got them, but they grew.
I think all hermit crabs kill snails, and eat them and take their shells, these are no execeptions, although they are probably not the worst as far as hermit crabs go.
Last updated: July 3, 2014