Who's all in with him right now? Sounds like someone might be nipping. Happens pretty often with newcomers to a tank, the existing fish haze him for the first bit until the new pecking order is established.
The good news is that it should regrow in time. Fins in fish are a little like fingernails..
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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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