Polypterus pelvic fin loss

[Ponera]

Best pics I could do. This fish is very very active, comes up to the open lid and plays, bites or splays water. Every single fin and finlet is healthy.

Why are the pelvic fins now losing "fin"?

45 gallon. Only other tank mates: 4 nerite snails, 4 rabbit/black cone snails, 3 pictus catfish and one fat corydoras. Usually the ammonia, nitrites and nitrates are around zero, depending on what the algae is doing in the tank but never very high.

 

[kno4te]

Maybe just getting nipped. Should grow back.

 

[twentyleagues]

Maybe just getting nipped. Should grow back.

My guess too. Possibly the catfish.

 

[Ponera]

I didn't know that the catfish were nippers. They are mostly scared of him because he used to catch them and carry them around. Most of the time the pictus are too busy slap fighting.

I found it strange it was only those fins, not the nice big pectorals or the caudal.

 

[Fathom]

Did the fin heal back yet? its been a few months since your post. I think it should have healed by now but sometimes it can take a while