Diamond Goby Died. Dont know why.

[Bear Claw]

My diamond goby is very healthy plump and eats well. He's also a constant sifter and I feed him regularly. The last couple of days I haven't seen him as much, but he's still been acting fairly normal. I saw him before I went to bed last night, but at about one the next day I was looking for him and behind a rock I found just a piece of his head. I found no other part of his body. Water parameters are all normal. What do you think it is?

 

[vetteguy53081]

My diamond goby is very healthy plump and eats well. He's also a constant sifter and I feed him regularly. The last couple of days I haven't seen him as much, but he's still been acting fairly normal. I saw him before I went to bed last night, but at about one the next day I was looking for him and behind a rock I found just a piece of his head. I found no other part of his body. Water parameters are all normal. What do you think it is?

Can be bacterial as they often acquire, lack of proper diet or internal
Hard to assess once dead and without pics and symptoms