Thanks. Please excuse my ignorance, do you mean it is a female puffer and hold his eggs inside ? Or he is eating snail eggs?Funny story for you, my hairy puffer was looking a bit 'thick', kind of looking like a fatty and I thought that I must be overfeeding. So I started cutting way back on feeding yet he was still looking big. Then one day Im doing a gravel vac on "HIS" tank and start sucking up tons of eggs. Turns out "SHE" was just holding eggs and that is why she looked so fat, lol.