Re: Moving lump on Dendrobates tinctorius cobalt
I think what is happening is that when the frogs gut is full the mass visualizes because of crowded inner capacity.
The mass could be a parasite, or a growth or deformed/duplicae of lobe which is more common than ppl think I suspect.
In captive bred herps I ran across a complete line of baby corns with enlarged hearts, and other oddities from Breeders.
A parasite would be a first suspect, tho.