This section temporarily contains information copied directly from Bulbapedia, and needs to be rewritten so not to be classified as plagiarism.
Seel is a pinniped Pokémon with a thick hide covered in bluish white fur. It has a pale tan maw with a large red tongue and a pair of tusks on its lower jaw. It has circular eyes and a black nose that is capable of closing while Seel swims. There is a small horn on its forehead, which it uses in combination with its tusks to bore through ice floes. It has two flippers on its chest, and two more on the end of its tail. When the tail is raised, it resembles a waterspout.
Seel lives on icebergs in frigid ocean waters. Its warm fur and thick hide allow it to swim in waters as cold as -40°C. It thrives in these cold environments, becoming more active as the temperature drops. Preferring to sleep during the day, it hunts for prey under sheets of ice in the late day and evening hours. While it is a graceful swimmer, it is awkward and struggles to move on dry land.