Real world/Merpeople

These characters are merpeople with an almost-human form, who live in our world with all its current problems. Humans don't know about merpeople's existence, so they have to be careful with their non-human traits that remain even in their human form. For example, they are ovoviviparous so they don't have nipples nor a belly button. Mermaids only have boobs to look more like women and seduce more easily humans, who are part of merpeople's diet.