Poseidon, the god of the sea in Greek mythology

Westland Sea King, the licensed version of the SH-3.

SH-3 Sea King

"The Sea King", a song by Hawkwind from their 1985 album The Chronicle of the Black Sword

Sea-King, the Viking name for a powerful pirate

Seaking, an orange and white, fishlike water-type Pokémon

Sea King, a One Piece animal