Every Mythical Creature That Lives in the Ocean Explained in 20 Minutes

The hippocampus is one of the oldest and least threatening creatures in ocean mythology, which is fitting because it was never meant to frighten anyone. Half horse, half fish, it served as the mount of Poseidon himself. A pair of them pulling his chariot across the Mediterranean while their golden manes trailed through the surf and their scaled tails churned white water behind them.