Crew
Aquarium Advice Freak
Just googles it. Found some pretty crazy results.
One possibility, your fish has been infected by a parasite.
On the other, and this one sounds pretty likely due to circumstance, it is a sign of healing from injury caused by ammonia, low ph etc.
One possibility, your fish has been infected by a parasite.
On the other, and this one sounds pretty likely due to circumstance, it is a sign of healing from injury caused by ammonia, low ph etc.