Manduba
Many-fingered leather coral
Marbled headstander
Marbled whiptail catfish
Marine betta
Maroon anemone
Massive starlet coral
Matamata turtle
Matted filefish
Merten's butterflyfish
Metallic squirrelfish
Meteor shower coral
Meyer's basketmouth cichlid
Mimic surgeonfish
Mini carpet anemone
Mission golden-eyed tree frog