r/TropicalFish

Aggressive ruby shark, what should I do?

I’ve got a ruby shark in my tank and it’s becoming really aggressive towards the other fish (it was fine for the first three months). It keeps chasing them around, guarding certain areas of the tank (the boat the ruby shark wont let anyone in), and generally stressing everything out.

Has anyone dealt with this before? Is this normal ruby shark behaviour, or is there something I should change in the tank setup?

https://preview.redd.it/mdcq46gno52h1.png?width=2206&format=png&auto=webp&s=f8d0aceaa9f88b324c51a395cc168ba6d4840d77

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u/weekendHooligan — 2 days ago