Hey have any of you heard of snails that kill everthing ecept for coral. I have some sand sifting snails that soome as a fish or anything comes near the sand it attacks and eats the fish. At first thought that my fish where dying due to water conditions but that is not soo. I witnessed the snails attack. They have consumed every fish I had in the tank. Still have several coral peices and they are growing like crazy. I watched a hermit crab walking on the sand the other day but the snails came out and started to bash it with their shells. Have you ever heard of such a thing?

Robert