Where can I find large swim fins?

My son harassed my ryukin and now he is missing scales and his poor fins are shredded. What can i do to help?

• I came in this morning to find my ryukin goldfish messed up. The first thing I noticed was something that looked like a chunk of fin on the bottom of m,y tank. then I looked at my fish and seen the damage. his tail fins are shredded beyond belief and even his top fin is shredded. i dont understand how he is even still able to swim. Is there anyway that I can help my fish recuperate? Any kind of special foods or medicines? The last time his tail fins were partially shredded was due to the dang crabs i had in the tank. Yes I had crabs in there and they tore him up. Pet store said it was fine. Anyway he took a good two weeks to heal and just sat at the bottom of the tank. This is worse than that. Is there anything I can do??? Please help me I love my Gus Gus.

• Answer:

  Take him to the vet, asking on yahoo answers is not as good as getting help from a professional. Plus your kid needs to learn to respect animals. I hope I helped.