Mascarene Red Seabream Mascota jumprock Masked angelfish Masked bannerfish Masked corydoras Masked garden eel Masked goby Masked greenling Masked grouper Masked Hamlet Masked julie Masked moray Masked pigfish Masked prickleback Masked puffer Masked shrimpgoby Masked spinefoot Masked stargazer Masked stingaree Masked triggerfish Masquerader hairy blenny Master's catfish Masthead Island pipefish Masu salmon Masuda’s dragonet Masui's shrimp-goby Matador triplefin Matano medaka Matcheek warbonnet Matrincha Matsuba Koi Maude's shrimpgoby Maugé’s dragonet Maugean skate Maul's searsid Maul's waryfish Mauritanian shortface eel Mauritian anemonefish Mauritian damsel Mauritian gregory Mauritian sardinella Mauritius dragonet Mauve goby Mauvelip threadfin bream Mawson's dragonfish Maxweber's pipefish Maya gambusia Maya hamlet Maya needlefish Maya pupfish