Pokémon #747 in the National PokéDex, a dual type Water/Poison Pokémon.
Mareanie is a starfish-like Pokémon with a purple stalk-like body and ten drooping tentacles that resembles hair. It has a blue and purple color scheme, and what appears to be a gloomy expression.
Its prey are Corsola.
It evolves into Toxapex.
Japanese name: Hidoide