FishProfiles.com Message Forums

I have a 75 gallon with a walking catfish in it, about 8", I was wondering if i could put a solitary rhom in there?

rhom? Whats that?

Pirahnas are very agressive and are best in a species tank. I'd get a few more pirahnas, and loose the catfish ^_^

Inky

I agree. I think pirahnas would look a lot better in a species tank.

rhom is another term for black pirhanas.

not 100% sure, but i think they are agressive and i would not risk it.

On another forum somewhere I saw where a guy had a very large pirahna with a really big school of long fin teras. He said he has never caught the pirahna going after them and hasn't seem lose any of his school.

I guess the pirahna is so big and the tetras so small that they wouldn't fill him up enough to make it worth the effort of chasing one down to eat it.

In most cases I would have to say that it wouldn't be a good idea though.

55G Planted tank thread
19G Container Pond
[IMG]http://i4.photobucket.com/albums/y118/Wingsdlc/Ric

Dought it. They are more like a nice snack. The only species I can think of off hand that does that is a Giant Moray Eel, which will only go after bigger fish. ^_^

Inky

From all that I have read, Rhombus pirhanas should be kept solitary!! Or death shall occur!!!!

72 gallon bowfront:Tanganyikan Lake set up
75 gallon: A. Baenschi trio,Cyanotilapia Afra Cobwe(4), copadichromis trewavase, protomelas sp. tangerine tiger(breeding pair)

Now that you mention it, most pirahnahs are anti-social. For some reason, I always want to treat them like red-bellies. Black Diamonds are like that too.

Inky

Rhombeus Pirahnas are more aggressive than their Red-Belly counterparts. It's not a fish that I'd risk putting anything I actually like with it.

--------------------------------------------
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian.

Check this out....

http://www.youtube.com/watch?v=BZv8y_RDGy0

55G Planted tank thread
19G Container Pond
[IMG]http://i4.photobucket.com/albums/y118/Wingsdlc/Ric

Interesting, but I wouldnt count on all rhoms doing that, especially if they are less habituated and have already been fed live food. That might be an exceptional specimen. Its possible a fish like that could ignore fish for months and then surprise you by wiping them out in one go. Theres no way to tell. Suffice to say its a piscivore and the risk shouldnt be taken. This is not a fish hampered by bite aperture, it can take larger or smaller fish. Its not really humane to keep other fish in with large piscivores, unless there is a clear symbiotic relationship between certain species they will live all their lives in the fear of being eaten. That actually contravenes animal welfare laws in many places.

So true, longhairedgit. Like I mentioned before, very very very very few preditors can resist other fish. Pirahnas are very very very very very very very preditory and will eventually eat or kill anything you put with it. Sorry, but I don't think that that would work out for you at all.

Inky

I was not saying that it was a good idea to keep these fish together but that this guy clames to be doing it alright. The little fish in the vid. Didn't really seem to be freaking out like they were in trouble though. I think I would have a hard time putting something in with a piranha. It would be like putting neons in with an oscar.

55G Planted tank thread
19G Container Pond
[IMG]http://i4.photobucket.com/albums/y118/Wingsdlc/Ric

serresalmus rhombeus should not be kept with any other fish that you value. as mentioned some owners have had success with keeping LARGE rhoms with schools of SMALL fish e.g. neons. but anything that seems to either be worth making a meal of, or may pose a threat to territory WILL BE DESTROYED. now, in the wild black piranha are often seen swimming side by side with any number of prey fish as well as forming loose shoals with other black piranha. but in home aquaria ive never heard of that working out.

I think to make it work you would have to have a really really large tank and make sure your moster is on a non live food diet only. This should keep it under control a little more. But every fish is different.

55G Planted tank thread
19G Container Pond
[IMG]http://i4.photobucket.com/albums/y118/Wingsdlc/Ric

I agree, a long tank would be a necessity. Like, hundreds of gallons. The equivilent of a pirahnah eating a neon though (when it is fed regularly) would be the equivilent of eating our meals regularly and finding a single pea somewhere. When combing pirahnas its almost like flipping a coin: Heads it lives tails it dies. No tankmates. Simple as that.

Inky