I've got blue moonlights on for night and he romes around and quickly hides again when the room lights come on. This one's life span is probably 6 more months.
Just pulled the little brat out of my filter this morning

the gap he fit through to get there is only 2-3mm wide, just shows how amazing these creatures are. Also been sorting through all the shells I put in looking for more crabs.
How often are they supposed to be fed? And has anyone had luck switching from crabs to some kind of inexpensive shrimp or even silversides.....molly fry? Crabs just arent always available.