I already fed my flowerhorn bro he seemed liked it i peel of the shell because im afraid he can't handle the shell to eatI'd feed them raw, pretty much like most other seafood.
Shell does have some nutritional value, but I can't tell you if it's risky for that fish. A huge fish like a 3 foot RTC or a natural predator like a Trigger fish would probably be fine, but for smaller freshwater fish it's probably a risk I'd avoid.
Here's a good thread on it:
https://www.monsterfishkeepers.com/...oiled-chilled-for-morays.660002/#post-7430701
thanks bro