Sure - feed away. With a larger fish as that, you may find that he has difficulties with smaller food. He is, also, probably used to eating on the bottom of the tank - not the surface (most fish will not reach "size" from surface feeding). He may not realize that floating stuff is food.
Have you ever seen a feeding cone? They are plastic cones that have slits in the sides. They stick on the side of the tank with a suction cup. You drop a cube or two of frozen bloodworms into the cone and as they thaw the little worms stick out the slots. The fish love to suck the worms out of the slots and the cone holds the worms steady for them - and keeps them from being lost in the tank/filter.
Frozen Brine shrimp (NOT baby brine shrimp) thaw quickly, too and can quickly become lost in a tank. A larger fish will generally gulp the whole cube, chew on it a while and burp out shrimp as he swallows and thaws it. Mine eat the whole cube ina gulp - and a whole cube of bloodworms, too.
With a larger fish, it is always advisable to balance out your heavy protien with greens - so when feeding bloodworms and brine shrimp, make sure you feed about twice the amount of greens as you do straight protien.