Black back butterfly

So one of my black back butterfly's died this morning, very sad they went in as a pair , the partner tried valiantly to keep his pal upright. Seems odd, they eat like pigs, but the one who died appear to be very skinny indeed almost like he was starved. ?
Was feeding them on frozen myasis, flakes, pellets and frozen algae grazer blocks, they would eat everything and anything, spent loads of time eating from the rocks and seaweed clips too.
A terrible shame for such a pretty fish, his buddy already looks lonely.

 

that stinks Ken.. May need to look for a new partner for it.. fun is in the shopping

 

I was disappointed that I might have not done everything possible to feed him and that I had made him starve, but his pal is like a ball with fins

 

so sorry for you loss Ken

 

Thanks OFK I was trying to upload a tank video yesterday, but you tube sucks and I think it's too big to post direct to the group board, so I will need to put my thinking cap on.