Perseus and Andromeda (Titian) was ruled by the beautiful but vain queen, Cassiope; she maintained that her beauty, and that of her daughter Andromeda, was superior to that of the sea nymphs, who were the daughters of Poseidon, the god of the sea. When the nymphs became aware of her claims, they protested to their father, who retaliated by calling up a Cetus or sea monster to ravage the coastline of Ethiopia placing Cassiope's kingdom at risk. On the advice of Jupiter Ammon, the Queen, together with her husband Cepheus, decided to sacrifice her daughter Andromeda to the monster. Perseus, flying back from his
Sea monster "Carta marina". This practice died away with the advent of modern cartography. Nevertheless, stories of sea monsters and eyewitness accounts which claim to have seen these beasts persist to this day. Sea monster accounts are found in virtually all cultures that have contact with the sea. For example, Avienus relates of Carthaginian explorer Himilco's voyage "...there monsters of the deep, and beasts swim amid the slow and sluggishly crawling ships." (lines 117-29 of "Ora Maritima"). Sir Humphrey Gilbert claimed to have encountered a lion-like monster with "glaring eyes" on his return voyage after formally claiming St. John's, Newfoundland (1583) for