Arter
- Macropleurodus bicolor Cichlider, Victoria - Uddøde arter
- Malapterurus tanganyikaensis Cichlider, Tanganyika - Andet
- Maskaheros argenteus Cichlider, Central Amerika
- Maskaheros regani Cichlider, Central Amerika
- Mastacembelus elipsifer Cichlider, Tanganyika - Andet
- Mastacembelus frenatus Cichlider, Tanganyika - Andet
- Mastacembelus sp. intermediate Cichlider, Tanganyika - Andet
- Mastacembelus tanganicae Cichlider, Tanganyika - Andet
- Mayaheros urophthalmus Cichlider, Central Amerika
- Maylandia aurora Cichlider, Malawi - Mbuna
- Maylandia barlowi Cichlider, Malawi - Mbuna
- Maylandia benetos Cichlider, Malawi - Mbuna
- Maylandia callainos Cichlider, Malawi - Mbuna
- Maylandia chrysomallos Cichlider, Malawi - Mbuna
- Maylandia cyneusmarginata Cichlider, Malawi - Mbuna
- Maylandia elegans Cichlider, Malawi - Mbuna
- Maylandia emmiltos Cichlider, Malawi - Mbuna
- Maylandia estherae Cichlider, Malawi - Mbuna
- Maylandia fainzilberi Cichlider, Malawi - Mbuna
- Maylandia flavifemina Cichlider, Malawi - Mbuna
- Maylandia glaucos Cichlider, Malawi - Mbuna
- Maylandia greshakei Cichlider, Malawi - Mbuna
- Maylandia hajomaylandi Cichlider, Malawi - Mbuna
- Maylandia heteropicta Cichlider, Malawi - Mbuna
- Maylandia koningsi Cichlider, Malawi - Mbuna
- Maylandia livingstonii Cichlider, Malawi - Mbuna
- Maylandia lombardoi Cichlider, Malawi - Mbuna
- Maylandia lundoense Cichlider, Malawi - Mbuna
- Maylandia mbenji Cichlider, Malawi - Mbuna
- Maylandia midomo Cichlider, Malawi - Mbuna
- Maylandia mossambiquensis Cichlider, Malawi - Mbuna
- Maylandia nigrodorsalis Cichlider, Malawi - Mbuna
- Maylandia nkhunguensis Cichlider, Malawi - Mbuna
- Maylandia pambazuko Cichlider, Malawi - Mbuna
- Maylandia phaeos Cichlider, Malawi - Mbuna
- Maylandia pyrsonotos Cichlider, Malawi - Mbuna
- Maylandia sciasma Cichlider, Malawi - Mbuna
- Maylandia sp. "aurora lumbaulo" Cichlider, Malawi - Mbuna
- Maylandia sp. "black dorsal heteropictus" Cichlider, Malawi - Mbuna
- Maylandia sp. "black dorsal nkhungu" Cichlider, Malawi - Mbuna