Mer-people 2

Asrai (Beautiful) Asgre Asgall, Achais (Bosom)
Cornwall. Faery women two to four feet high, with long green hair and webbed feet who live in deep lakes and seas and come out naked at moonlight every hundred years. If the sun touches them they melt into a pool of water. Called sea ghosts because of their extremely pale, translucent skin. (33)