Clown fish killing spree?

[Red2143]

For the past 1.5 years I've had a biocube with a clown fish, pj cardinal, tail spot blenny and royal gramma. Nothing has been added to the tank for over 6 months. Fish seem healthy and eat every day. I've never seen any fighting during the day.

Over past 2 weeks the pj cardinal, tail spot blenny and royal gramma have all died. Could a clown fish all of a sudden start attacking tank mates over night?

 

[littlehermit0]

For the past 1.5 years I've had a biocube with a clown fish, pj cardinal, tail spot blenny and royal gramma. Nothing has been added to the tank for over 6 months. Fish seem healthy and eat every day. I've never seen any fighting during the day.

Over past 2 weeks the pj cardinal, tail spot blenny and royal gramma have all died. Could a clown fish all of a sudden start attacking tank mates over night?

Imo this shouldn't happen but I once had a peppermint shrimp that was healthy and then I bought clowns and the shrimp died immediately after 3 days , I noticed that the clowns would sometimes bite the shrimp, it's possible I would check for some bite spots on the fish

 

[twentyleagues]

For the past 1.5 years I've had a biocube with a clown fish, pj cardinal, tail spot blenny and royal gramma. Nothing has been added to the tank for over 6 months. Fish seem healthy and eat every day. I've never seen any fighting during the day.

Over past 2 weeks the pj cardinal, tail spot blenny and royal gramma have all died. Could a clown fish all of a sudden start attacking tank mates over night?

How did the dead fish look? Any signs of aggression during feeding? Yes especially if they are looking to have babies they get extremely aggressive. I had a pair of clowns take an entire 75g tank as their territory once they decided to breed. They beat up everyone in the tank with in a week of deciding it was time. Luckily I was upgrading tanks and basically the entire system so I had options. In a biocube there isnt much space to hide so I could definitely see clowns killing other fish their size or bigger.

 

[AlyciaMarie]

Oh, sorry for your loss.

Like others have said, did you get a look to see if the deceased fish had any trauma to their bodies? It definitely wouldn't be out of the realm of possibility. Clowns can be vicious.

 

[Red2143]

Oh, sorry for your loss.

Like others have said, did you get a look to see if the deceased fish had any trauma to their bodies? It definitely wouldn't be out of the realm of possibility. Clowns can be vicious.

Oh, sorry for your loss.

Like others have said, did you get a look to see if the deceased fish had any trauma to their bodies? It definitely wouldn't be out of the realm of possibility. Clowns can be vicious.

From what I can tell it looks like the webbing between the fins is gone so I just see the longer lines. I don't see any obvious bite marks or missing chunks

 

[twentyleagues]

From what I can tell it looks like the webbing between the fins is gone so I just see the longer lines. I don't see any obvious bite marks or missing chunks

Missing and torn fins, possible missing scales, "bruising" on the body, are typical signs of aggression. The only chunks that the clowns would probably remove would be fins.