Although carnivorous, it is not really a piscivore.
Looking at the body and mouth shape, lets you know it is fairly inept as predator of fast moving prey.
Instead it is more of an insectavore (those that drop on the surface), and a feeder on aquatic crustaceans, mollusks and worms.
H coryphaenoids (often confused with it, as they are very similar in appearance) is known as an opportunistic scale eater, not chasing down other fish, but taking a quick bite of those unsuspecting fish that get too close.