Do cory's bite?
I have a fully cycled 200 litre well planted (fake and real) tropical tank which contains 1 male betta, around 15 tetras: neons, red and harlequin and last night I added 2 peppered, 1 albino and 1 bronze cory's and a spotted and zebra snail. When I turned the tank lights on today I noticed one of the smaller red tetras is missing half his tail. Would a cory do this?
i wouldn't have thought so,tetras can be nippy,and so can a Betta.
I have been keeping Cories for 20+ years and have never seen them act aggressive towards another fish. Neons can get nippy within their own school fighting for hierarchy but I have never seen them aggressive with other fish species. I would think it would be the Betta being nippy.
The tetras are the fish with the teeth. I find it highly unlikely that the corys could do that type of damage.
A Betta really should not be in a community tank. This is one fish that is much better on its own. For one thing, Betta will easily eat neons [mine did], but eventually the neons are likely to find it playful nipping the Betta, causing stress. Either way, not good.
What species is the "red" tetra? And "Harlequin" presumably refers to the Harlequin Rasbora, not a true tetra, though somewhat similar in behaviour and needs. All of these fish should be in a groujp of at least six of their own species. With less, nipping among the tetras is quite possible.
As for the corys, they do not have teeth except in the larval and juvenile stages when they have small premaxillary teeth that they subsequently lose. I have never heard of a cory biting anything, they are probably the most peaceful of all fishes.
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