I came home today to a most mysterious scene. Both my purple sea slug and bicolor goatfish were gone. My tank only has a very thin (1/4") slit that is open. I searched around the tank (it's on a dresser against the wall - had to take out the drawers to check under the dresser) and there weren't any carpet surfers. I look around in all the nooks and crannies in my live rock and couldn't find anything.
Finally, I decided the only place that I hadn't checked was in the little set of tunnels my diamond goby dug under one of the pieces of rock. I lifted up the rock and there was the goatfish practically buried in the sand (I have about 2 inches of fine LS
as the base). I poked around the same place for the sea slug, but couldn't find anything.
I inspected the poor dead goatfish and there weren't any visible signs of distress (to my untrained eyes at least). He's been in the tank about 2 weeks. For the first week, my coral beauty was really bothering him. I moved around the rocks a bit and everything settled down (LFS
suggested I do this if the coral beauty was getting too territorial).
So, I have a few questions. Just to give some background, I have a 30g FOWLR
tank that's been running for a few months. The only deaths I've had so far are 2 turbo snails that died when my original filter got messed up and kicked back filter scum into the tank. Up until some time today my tank was stocked with a bicolor goatfish, coral beauty, diamond goby, turbo snail, purple sea slug, and 2 margarita snails.
All that being said, would any of the fish above have eaten the sea slug? If it's the goatfish, is it possible that's what killed him?
What a bummer.........