merman,male mermaids,become pregnant like seahorses and females can impregnate them.mermaids(females) carry out external reproduction and spawning.while mermans(males) carry out internal reproduction and become pregnant.

the merman king and the mermaid queen are the strongest genetically in reproductive matters. especially the king. Interestingly, the puppies gestated by King Aiden are stronger and more resistant.

Aiden was lying in the royal chamber feeling the movements of his puppies