mackerels, king - mouth-brooder, Mozambique
- mackerels, king
- mackerels, short
- mackerels, snake
- mackerels, Spanish
- mado
- madtom, brindled
- madtom, stonecat
- madtom, tadpole
- madtoms
- magarei
- mahseer
- maigre
- maigre, spotted
- major, sergeant
- majors, sergeant
- mako, Atlantic
- mako, long-finned
- mako, sharp-nosed
- mako, short-finned
- mako, shortfin
- makos
- malpulutta
- malpuluttas
- mamba
- manefish, Japanese
- manefishes
- manta, Atlantic
- manta, Pacific
- manta-sucker
- manta-suckers
- mantas
- manyspine, Amazon
- manyspines, African
- maomao, blue
- maomao, pink
- marblefish, spotted
- marblefishes
- margate, bastard
- margate, black
- marinka
