i all the sudden have 3 of these guys scouring my tank. this one is just under an inch long, white, has two antenna's like a snail, im thinking its some sort of sea hare. there's a darker one, but he's gone into hiding. seems they were fine til the lights came on, now they're kindof hiding out away from the direct light. i'd just like to know that this is a harmless sea hare and not something bad. as i say, suprise! here's 3 in your tank. may have come in on a rock or something the last week from a new coral, but i've never seen them before.
