Llyr: Celtic (Welsh) god of the sea.
The Castle of Llyr by Yaniv Shimony. Cover illustration for a book by Lloyd Alexander.
Mazu: Chinese goddess of water and protector of sailors.
Mazu with a lantern.
Iku Turso: malevolent Finnish sea monster.
Iku Turso by Nuctameron at Deviantart.
Poseidon: Ancient Greek god of the sea / Neptune: Ancient Roman god of the sea.
Neptune and his Chariot of Horses by Domenico Antonio Vaccaro.
Agwe: Spirit of the Voodoo religion with control over the sea.
Agwe by UlaFish at Deviantart.
Varuna: Hindu god of the oceans.
Ryūjin: Japanese dragon and god of the sea.
Princess Tamatori steals Ryūjin's jewel, by Utagawa Kuniyoshi.
Tangaroa: Maori god of the sea.
Tangaroa, Tangaroa, Tangaroa, Siva by Michael Tuffery.
Ægir: Norse god of the sea, Rán: Norse Sea goddess.
Ægir, Rán and their nine daughters prepare a huge vat of ale, 19th Century.
Davy Jones: The devil of the seas in Pirate Lore.
Yemaja: Goddess of the ocean in Yoruba religion and many Afro-American religions.