1. Some kind of isopod. I'd be a little bit leery of this one, some are parasitic on fish.
2. Some kind of macroalgae.
3. Hydroids. Although technically not as bad as some things, not great because they spread, are unsightly, and sometimes can sting corals.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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