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What size tank and age of tank ?Hi, one of my 5 Anthias has its fins a bit torn up. Another rhomboid wrasse also looks a bit rough. The tank is heavily stocked with 20-30 fish.
Is this a sign of a disease? Flukes? Or just aggression from another fish? Pics of Anthias and a video also attached.
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Flukes can make a fish look sort of tattered, but not this severely - I’d say tankmate aggression here. Tough to catch this because while you are watching the fish, they stop fighting to watch you.Thanks, I will keep an eye. It is a 200gallon tank. Established 2 years and these fish are probably closing a year in the tank now. There are mostly tangs and wrasses.
Most likely culprit is the male Anthias (it’s a group of 1 male and 5 females). Though I have not seen any aggression between the fish except the yellow and purple tangs.
Other possibility is that I have some sort of killer hitchhiker.