DT or Sibling Fin Nipping ?

BETTASCAPESUK

Judt noticed during feeding one of my 40 day old koi fry has a split in his tail and I am wondering this might be the beginning of DT or some of his siblings nipping.



20220203_161802.jpg
 

ForBettaorForWorse

I don't think it's a double tail. From my experience, Double tails' splits start at the base of the tail. This just looks like damage to the tail.
 

BETTASCAPESUK

I don't think it's a double tail. From my experience, Double tails' splits start at the base of the tail. This just looks like damage to the tail.
I don't know when they develop and I wasnt aware that the parents might carry the DT gene thats why I am surprised if it is infected a DT. I found this picture from basement bettas of a DT fry which looks similar and starts at the end of the fins.

I will see how it develops, if it is a tear it should heal fast as they get 50% daily water changes.
 

NearMeBettas

Looks like a nip to me, not a DT.
 

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