For example, mermaids are always believed to have beautiful singing voices. Native American legend tells of a mermaid who would rise from the water and sing, calling people to her. Her song drove humans first to ecstasy, then to madness. So we can conclude that mermaids have beautiful voices. Their irresistible lure we may dismiss as the hyperbole that gathers around all legends.
Mermaids can predict the weather and sometimes warn humans of storms.
Mermaids are also characterized as being wanton, vain, and beautiful. The Babylonian mermaid goddess Atargatis was represented thus, as where the Apsaras, and the Jalpari or water-fairy of the Punjab district. Of course, this reputation could exist because mermaid legends are often filled with male fear of women. I think the mermaid personality is more likely lighthearted and carefree. Fantasy novels and movies generally represent intelligent nonhumans, such as space aliens or fairies or mermaids, as morally superior to us, living in peace and harmony humans can only envy.