This is one of my male long fin gold danios. He is one of the first fish I got when I started the hobby in April. He was full grown when I got him, so I guess 8 months minimum. I've noticed this lump about a month ago and it has grown a lot in the weeks since. None of the other danios are sick and his behavior is normal. Except I don't see him spawn any more.
Nitrate 100 (
We do weekly water changes every Tuesday and have been having trouble on and off with our nitrates being high and algae issues. I think I'm border line over stocked but I'm getting ready to move four big angels out and in to two breeding tanks so that should help.
Is this cancer?
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