So serious question.......
My yellow coris(H. Chyrsus) is roughly 8 years old now. He only comes out for like an hour or so in the AM when the auto feeder goes off, then is back in the sandbed for the rest of the day. He used to be out all day every day, and was first in line when I hand feed frozen in the afternoon. He also used to be the tank boss, but since he's MIA all day, the blue eye kole has taken over that role.
Is it simply because he's getting old, and perhgaps dying? Or could there perhaps be something else going on? I have no idea what their lifespan is, but he was a very young juvenile female when I got him. Has since transitioned many years ago, and as of recently(maybe the last few months) has gone to this hiding behavior.