Can nassarius snails catch and eat a sleeping percula clown?
My two percula clowns went missing over two consecutive days and I can't figure out what happened. Both fish were doing fine, eating, and showed no signs of illness. I saw them sleeping/wiggling around on the sand together at night. I noticed that there was a nassarius snail that had come up from the sand and was probably 2 inches away from where they were sleeping. When the lights came on, one of the clowns was missing. Then the next day the other one went missing. In the past, when I had a fish die in my tank, the nassarius snails came out and ate the corpse, but I would usually see all the snails in the same area and would find pieces of the corpse. I'm pretty sure the clowns are dead, but the snails weren't bunched together like in the past. I've checked the filter and outside the tank but I didn't find them. I also tested my water and everything came back fine. The other fish and corals in the tank are doing great. Could any of the following things in my tank be responsible for the disappearance?
Scarlet Hermit Crabs
There are some other corals and turbo snails in the tank, but I thought it was more likely one the things above that caused the disappearances.