Hello,
When I purchased my Oto catfish from my local fish store I noticed whilst some where the standard grey colour, others had yellowish heads and mouths. I decided to only choose the pure grey ones.
All is fine until yesterday when I noticed one of the Oto starting to have yellowish colour change to head and mouth. Is this normal or is colour change due to diet? I do feed Oto's cucumber.
When I purchased my Oto catfish from my local fish store I noticed whilst some where the standard grey colour, others had yellowish heads and mouths. I decided to only choose the pure grey ones.
All is fine until yesterday when I noticed one of the Oto starting to have yellowish colour change to head and mouth. Is this normal or is colour change due to diet? I do feed Oto's cucumber.