Pompano dolphinfish are carnivorous, feeding primarily on small fish and squid. Pompano dolphinfish have compressed heads and dorsal fins extending the entire length of their bodies. The predators of the lined seahorse include crabs, rays, skates, seabirds, sharks, tuna, and dolphinfish. Pompano dolphinfish have a lifespan of three to four years. Juvenile filefish are at risk from predation by tuna and dolphinfish. See" Coryphaena "for the possible etymologies of "dolphinfish". The dolphinfish can reach up to about . In dolphinfish, males have larger and blunter heads than females.