Are clown fish aggressive?

My clown fish is acting aggressive - Hi i have 2 clown fish and one of them has all of a sudden been acting aggresive to the other clown fish. it keeps nipping at it and keeps the clown fish in the read more

They are passive non-aggressive fish unless there are two pairs in the same tank which in your case can't happen. Another couple passive clowns are the skunk clowns and percula clowns. 154g system, 125g tank, Nova 4x54, 29g sump/fuge, ASM G-2 with Sedra 5000 pump, Mag 9.5 return, fuge with a clip on 6100k bulb with chaeto, 3" sand bed, 2 Korallia 1400's in DT, DSB in fuge. read more

In it I have 2 clowns, spotted puffer, coral beauty, and a foxface. For the first while everything was great but in the last couple weeks one of my clowns has gotten very aggressive. Initially there was an issue with him and the foxface but now he is aggressively going after my puffer fish almost constantly. read more