yea they still are how do i do that i’ve only ever had to deal with external parasite's and sickness like ick and swim bladder issues im not even sure what to look for when it comes to internal parasites, is it something i need to worry about it transferring to my other fish? the fish in question originally came from predatory fins idk if that would make them les likely to have parasites or not
No i wouldnt jump to any conclusions, just keep an eye on them. Velvet or similar pathogens can affect the gills, making it difficult to breathe or swim. I would just do some research on freshwater oodinium and similar parasites and watch for symptoms.