Fat Zebra Danio

Hi Murf

Are the scales protruding from the body....like a pinecone ?  if so,  suspect it's dropsy. I used to have zebra danio and never seen one that big, even with eggs.

No protruding scales, already checked for dropsey so I've been thinking it might be constipated.  Been thinking of squeezing her very gently as you would a chiclid for eggs etc.  Afraid of harming her though.  Gonna try the peas first though as she is eating ok.

Is the danio behaving/eating normally? If it is, then it is up to you whether to euthanase. I only say definitely yes if the fish is obviously suffering. You can see the fish, you'll know if it's time. Do you know the methods?
It is possible it has a tumor or some other blockage, but the only way you'd find that out is by a post mortem examination.