Sea monster

Along the shores of the Isle of Man in the early 1700s, a creature ate all the fish causing a famine throughout th village. This caused young Turner Billy Turner to be sent away to seek riches for his family in North Carolina. On the course of his adventures, Billy found out the sea monster was controlled by Captain David Donovan, a ruthless pirate. After realizing that the eel-like sea monster was the cause for his village's famine, Billy slayed the beast by stabbing it in it's heart.

Biology
This sea monster lived off the wreckage from ships destroyed by David Donovan. The sea monster was a long scaly beast who resembled a large eel. Oddly enough, the creature's heart was located in its head instead of its chest.