My fish died why

[Perthegallon]

So my fish tank is a year old just got this fish about 6 months ago not a crowded tank at all. He’s been happy living in it good amount of food for him to eat. I see no issues with parameters and all corals and fish look fine. Have not got anything new in months and always qt. For some reason though I found him dead today with no marks on his body at all and his belly was full of food

 

[Azedenkae]

Could it have been stung by something in the tank maybe?

 

[Perthegallon]

Could it have been stung by something in the tank maybe?

BTA Anemone or torch coral?

 

[vetteguy53081]

Both can but BTA likely

 

[Perthegallon]

Both can but BTA likely

Weird though since it’s in a glass cup in the back and it’s super tiny