Originally posted by meemmoo
I saw this on the bottom of my tank. Could it be a baby Mantis. It jumped like a flea while I was trying to get a picture.
Nope, that is a normal colonizer of live rock. They are harmless and in fact beneficial as they clean up detritus and keep the worm population in check.
If you ever see brown pupa casings floating in your water, they came from this animal when it left the larval stage.