RovingGinger Posted August 11, 2020 Share Posted August 11, 2020 (edited) Yesterday I noticed one of my smallest julii corydoras sitting on some java moss not as active as the others. Today I observed the same thing - not really romping around, just sitting still - and the bottom part of his back fin looks chewed. I don't see redness, etc, or other damage to him. The tank is a 40 breeder with 7 other julii corys and a bunch of mutt guppies/endlers of all ages. Is he simply getting picked on for being kinda small or should I be looking for something else? I have him in a separate tank right now and will try to add a photo. Edited August 11, 2020 by RovingGinger Added sad cory tail photo 1 Link to comment Share on other sites More sharing options...
Daniel Posted August 13, 2020 Share Posted August 13, 2020 How is sad cory doing now? Link to comment Share on other sites More sharing options...
RovingGinger Posted August 13, 2020 Author Share Posted August 13, 2020 He's hanging out in a small tank with a couple of bent guppy fry, can't really see anything behaviorally off. He seemed a little skinny comparatively so I'm thinking maybe he's just struggling to compete with the big guys a little and maybe underwent some tail nibbles, but I'm not seeing signs of anything more. 2 Link to comment Share on other sites More sharing options...
Mark Mason Posted August 13, 2020 Share Posted August 13, 2020 I had one of my J Cory's hit the top lid hard and he was down for a week but he recovered hope the same for you Link to comment Share on other sites More sharing options...
Brandy Posted August 13, 2020 Share Posted August 13, 2020 If he's small and lethargic, would internal parasites be a possibility? I don't know anything about how prevalent they would be in corys? Link to comment Share on other sites More sharing options...
RovingGinger Posted August 13, 2020 Author Share Posted August 13, 2020 Community ecology of parasites in four species of Corydoras (Callichthyidae), ornamental fish endemic to the eastern Amazon (Brazil) WWW.SCIELO.BR I didn't read the whole thing but it would appear yes, at least in general in wild caught they would be. He was a petco boy so that might be a possibility. The fin doesn't seem to be getting worse and he was eating yesterday, so I'll see if he continues to be skinny on his own? I don't expect him to be terribly active without his friends. 1 Link to comment Share on other sites More sharing options...
MR aquarium Posted August 26, 2020 Share Posted August 26, 2020 if he is a very young/small cory then it could be possible that he got his fin lodged in the filter and it may have ripped of that is the only thing that i can think of for the cory getting stuck somewhere. as for being inactive i would say it is normol for a injured fish to be laid back and not move much i have had corys in all my tanks and that is the most likely things that i can think of. he should heal up real well if you keep water conditions good. Link to comment Share on other sites More sharing options...
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