Slow SD death

[CatLover]

I just got home from work about 5 minutes ago and discovered that my SD is floating

He isn't dead (yet), his belly is right on the water line and he is just floating around like that. His breathing is getting slower and his dorsal fin is clamped (that's the only fin like that). Both the dorsal and caudil fins are black. Blood has risen to the surface right behind his left gill.
He was healthy and happy as could be 8 hours ago
I... think he just died

 

[TorPeteO]

I'm very sorry to hear that. I've read threads about SDs playing dead on this forum, and I sincerely hope yours is only doing that. If not, sorry for your loss.