I apologize in advance for not having a photo, but i found a crab in my tank the other day and i need some info on it. it looks exactly like a fiddler crab (same size and structure) you see in fresh water tanks but it is red. there is no brown and the crab is about 1-1.5 inches across. like i said it looks exactly like a fiddler crab. anyone seen something like this before?