A few months ago we noticed a small dark mark in our male guppy's tail. We kept a close eye on it and since then it's grow a bit as shown in the photos.
Has anyone got any idea what this could be? I've seen a similar post about this elsewhere but there was no conclusion. The fish seems to be behaving and eating as normal.
Apologies in advance for the poor photos - he really doesn't like staying still!
Has anyone got any idea what this could be? I've seen a similar post about this elsewhere but there was no conclusion. The fish seems to be behaving and eating as normal.
Apologies in advance for the poor photos - he really doesn't like staying still!