His human form was beneath his fish form, which allowed him to live among men, as well as in the sea. Share on Twitter Share on Facebook. In Old English, "mer" means "sea," and "maid" simply meant woman. When sailors would spot them at night, perhaps in the moonlight, many thought they were Sexy mermen and mermaids upon mermaids. In addition to being treasure, people once believed this gemstone came from the tears of mermaids, and it used to be thought had the power to protect Sexy mermen and mermaids when they were at sea, or when they fell into the water.