I mean if they're really like fish then (assuming that since it did say both males and females can get "pregnant") will lay eggs and then (like I said before assuming both males and females can fertilize eggs since some species
of fish females can fertilize eggs)will fertilize them
Think dolphins
idk if its the same but try reading this chap
http://www.mangago.zone/read-manga/tell_me_your_wish/mpn/ibx_chapter-17/pg-1/
Lmfao jail
How do mermaids fuck? Do they just slap their tails together I’m curious