Must be some type of deficiency in their diet. wonder if more people started feeding smaller fish w/ heads or just the heads to their rays if the rays would leave their tank-mates alone? I'm naughty and feed my tank w/ goldfish and the rays will eat a few each time ( at least the heads) But have never touched a tank-mate. I mean instead of feeding just fillets... like asking the butcher for a salmon head ect and tossing it in every month or so? just fish out whatever they don't finish off in an hour?
personally you guys post so many threads about fish missing their heads from otherwise fine tank-mates ect there has to be some rhyme or reason to it since its not just isolated cases/rays..
And sorry for the loss Trev.. that looks like it was a stunner.
so dug around abit... from what I can tell fish heads are high in Iodine, and the B-Vit spectrum. ?