Don't be afraid to keep those trevally gurn, bleed them as soon as you catch them, put them on an ice slurry and as Dignity said , beautiful firm white flesh, perfect for curries or on the bbq, 99% of fish are good to eat if they are treated correctly when caught, bleeding and ice slurry is the go, works on crabs and prawns a treat as well, good post by the way
MSB