Marico barb Marine goby Marine gudgeon Marine sailfin silverside Marini's anchovy Marini's grenadier Marion's spiderfish Marjorie's hardyhead Marjorie's Wrasse Marked goby Marlin sucker Marlin-spike grenadier Marmalade Razorfish Marmara barbel Marmara goby Marmara sprat Marmorated medaka Maroni eartheater Maroon clownfish Marquesan Cardinalfish Marquesan Coris Marquesan grouper Marquesan parrotfish Marquesan Pipefish Marquesan Razorfish Marquesan rockstripper Marquesan sardinella Marquesan Scorpionfish Marquesan Sergeant Marquesan Shoregoby Marquesan Shrimpgoby Marquesan Surgeonfish Marquesan Toby Marquesan Wrasse Marquesas butterflyfish Marquesas ruddertail dragonet Marquesas Shrimpgoby Marrero’s tube-snouted ghost knifefish Marr's fusilier Marsh killifish Marshall Is. dottyback Marshall Islands moray Marshall slopebrotula Marten's moonflounder Martenstyn's barb Martina’s dragonet Marvelous dwarf snailfish Mary River cod Maryland darter Mascarene goatfish