Bloated tail spot

[cpate]

Any idea what’s going on with this guy? His energy and hunger levels are like they’ve always been but his stomach looks wrinkly and swollen for about a week now. Some days looks worse than others. Thanks!

 

[Humblefish]

Have you seen any white stringy poo come out of him?

Could be he has internal parasites or intestinal worms: https://www.reef2reef.com/threads/internal-pathogens.267419/