03-14-2008, 08:51 AM
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In contrast to what matt said, I would be slightly worried. Under normal circumstances, hermits can be quite comical in their behavior. There are a variety of different hermits available to the hobbyist. Each species has different patterns of aggression. Since hermits dont grow their own shells, they need to scavenge for the shells that protect them. As they grow out of a shell, they will seek a suitable replacement. Given the fact that you have no empty shells available for the hermits to relocate to, they will seek to make themselves an available replacement by either killing off snails untill a suitable shell is found, or by invading the shell of another hermit. In the wild, there is an abundance of shells for these hermits to relocate to from the natural predation of the various snails in the reef. I would recommend a trip to your local LFS and seek out a variety of variously sized empty shells suitable for the hermits' growth for a long time. Empty shells also come in handy as natural reef plugs for fragments of corals like finger leathers, xenia, and branching SPS corals.