Horsea

Horsea is a light blue, seahorse-like Pokémon. It has red eyes, a long, tubular mouth, and three spike-like fins on either side of its head. Its ridged belly and single dorsal fin are cream-colored. Highly adept in the water, it uses its dorsal fin to swim in any direction while facing forward. It has a tightly curled tail that it can use as both a balance and an anchor when caught in a strong current. In safer environments, it uses its tail to play with other members of its species.

Horsea feeds on insects and moss gathered from rocks. If Horsea senses danger, it sprays water or dense black ink from its mouth at its attacker. It can shoot more precisely at insects flying above the surface of the water. Horsea nests in coral reefs and islands throughout oceans with gentle currents. Many Eggs are laid every year, and the young are raised by the male Horsea rather than the female. Horsea swims with dance-like motions, creating whirlpools in the process. It tends to compete with each other to see who can create the biggest whirlpool.

Green had a Horsea in ''Zap! Zap! Zapdos!'' on her team that she received from Silver in exchange for her Granbull following their escape from the Masked Man. She used her in her crafty tricks such as cloaking areas with Smokescreen or leaving ink trails. She was later transferred back to Silver, and eventually evolved into Kingdra.

A Horsea appeared in  Breath of the Dragonair Part 1'', under the ownership of a Trainer. It was used in a surfing contest, before it was interrupted by Lance controlling the winning prize, a Dragonair.

Lance's Horsea was seen in a flashback of his and Clair's childhood in The Last Battle II.

A Horsea was one of the aquarium Pokémon seen in Archie's collection in Stick This in Your Craw, Crawdaunt I.

A Horsea appeared in Out-Odding Oddish, under the ownership of a Pokéathlon participant.