Are seahorses fish? Yes, seahorses are a peculiar marine creature. Different from many common fish, their bodies grow like a slender tube, with many backbones composed of bone plates on their backs to protect their bodies. Their unique dorsal fin helps them maintain balance and they use their additional pectoral fins for movement.
Answer: yes
Seahorses are fish. Although it looks very different from a fish in appearance, it actually uses gills to breathe and relies on its fins to swim in the water. It belongs to the fish of the genus Seahorse of the order Acanthophoridae, with a body length of about 5-30 centimeters, a head like a horse, and a dorsal fin composed of rays that can move independently.