Mermaids, Tritons, Sirens or the overall class of Sirenia is a vast and wide net of varying aquatic dwelling humanoids. Highly dimorphic, no two species are identical. However one thing you’ll see pretty consistently across the various species of Merfolk is the unique “false face” adaptation.This illusionary facial feature is believed to have evolve as a defense mechanism. The “true eyes” are located on the far side of merfolk heads. While it’s “false eyes” sit where a human’s would. These false eyes are actually highly sensitive receptors used in hunting. They also emit pheromones. Merfolk mouthes appear relatively similar to that of a humans, however it is actually hinged and can extend like that of a fish. It’s mouth filled with tiny serrated teeth.