By NC Wyeth. [Golden Age Comic Book Stories]
By James Jean.
The Sea Ghost
By Jay Piscopo, who has a series of graphic novels called The Undersea Adventures of Capt'n Eli based on the Capt'n Eli soda line from Maine. Sea Ghost is a Hanna Barbera-inspired character from the series who's spun off into his own one-shot. [The Comic Book Catacombs]