This reasoning runs parallel to that of a mirage, wherein a tired and thirsty individual wandering in the desert in search of water experiences an optical illusion. Just like the thirsty wanderer in the desert, spending months together on the ship is bound to make sailors wary of the sea. In such circumstances, the image of a beautiful mermaid sitting on a rock, in the middle of the vast ocean, can be best described as nothing, but a hallucinatory experience.