Mermen (and mermaids) are not real creatures, therefore, they are not studied.
Although currently undiscovered, marine biologists would study "merpeople" because all substances and living creatures whose habitat and environment is set in water is studied by those people. Although they have not been proven to exist, and are only hybrid fish and human set in mythological stories, legends and fairytales. Technically they are not studied at all due to the fact that they do not exist, although marine biologists would study them, possibly along the side of biologists.
cryptidoligist
Because there are no such things as mermen
Mermaids are female, and mermen are male.
Mermaids and Mermen don't die because they're fictional.
ye they do
No.
Probably, though mermaid and mermen don't actually exist, except in books and in films.
I don't think, and I mean men only turn into mermen by kissing a mermaid.
that is our belief
Yeah mermen
they don't
Mermen, silly!