• Mª Claudia
• M.A.A.C
• Ma Asin
• Maakana Corner
• Maaneyreh
• Maaya Thila
• Macaxeira
• Macdonald Bridge
• Maclearie Park
• Macro Haven
• Macro Jetty
• Macro Mania
• Maderno, Palestra Subacquea Sommozzatori Bresciani Leonessa
• Mades
• Madigaa
• Madivaru Beru
• Madivaru Corner
• madonna
• Madonnina
• Madrépore Manta Point
• Maggie's Maze
• Magic Island House Reef
• Magic Point
• Magic Point
• Magic Rock
• Magic Wall
• Magnet
• Magno Cave
• Maguey Pinacles
• Mahanga Bay
• Maheleg
• Maherida
• Mahurangi Island
• Mai Thon
• Mainit
• Maison Verte
• Maite
• Majestic Unicorn Cove (Muc)
• Makronisi
• Mala Afrika
• Mala (Charco del Palo)
• Mala Dragica
• Mala Wharf
• Malaga Cove
• Malakoff Wreck
• Male' Caves Divesite
• Male Srakane, Cave, Kroatien
• Malepasso
• Malgrats Este
• Malhos Tila
• Mali Cutin
• Mali Lošinj Cikat Bay
• Malibu Bay
• Malo Kolo
• Maloneys Beach
• Malpique
• Malvin Norte
• Malvin Sur
• Mama Hanh Beach
• Mama Viña
• Maman
• Maman Right
• Mammoth Lake
• Mammuthone
• Man and Wife Rocks
• Manantial Media Luna
• Manchones National Park
• Mandarin Garden
• Mandarin House
• Mandarin Valley
• Mandolin
• Mandria Pots
• Mandu
• Mandy Ray Wreck
• Mandy's Eel Garden
• Mangel Halto
• Mango Bay
• Mangrove
• Mangrove Bay
• Mangrove Corner
• Mangrove Point
• Manhattan Plaza Health Club
• Maniguin Island
• Manijin Island
• Manila Channel
• Manly Bommie
• Manly Cove
• Mansud Wall
• Manta Arch South Solitary Island
• Manta Bay 3 - the Crack
• MANTA DIVE CENTER
• Manta Dive-garden Eel Cove
• Manta Drop
• Manta Point
• Manta Point
• Manta Point Komodo
• Manta Ray Bommie
• Manta Reef
• Manta Ridge
• Manta Road
• Manta Run
• Mantigo Wreck
• Mantigue Island
• Manuel's Wall
• Manzanillo
• Maona Wreck
• Maona, wreck
• Mar Menuda
• Mara Rosa Dive (Small Trip)
• Maracaibo
• Marades
• Maraldi
• Marathon Cape
• Marble Arch
• Marble Wreck (حطام الرخام)
• Marc's Dream
• Margarita
• Margate Bay
• Mari Mari House Reef
• Mariana (Wreck)
• Marianna Shipwreck
• Marianne
• Marie Grota Cave/cliff
• Marienschlucht - Bodensee
• Marina Bay/marita’s Rock
• Marina de Arrecife
• Marina del Este
• Marina del Este Left
• Marina del Este Nerja
• Marinca Rat
• Marine Np el Toro
• Marine Park
• Marine Room Turtle Reef
• Marirssa
• Maris Rock
• Maritime College
• Marley Point
• Marlin Pinnacles
• Marmoler
• Marmora Scuba Park
• Marsa Abu Dabab
• Marsa Abu Galawa
• Marsa Baryka
• Marsa Egla
• Marsa Gabal el Rosas (Ducks center)
• Marsa Mourain
• Marsa Mubarak
• Marsa Murain
• Marsa Nakari House Reef South
• Marsa Shagra House Reef
• Marsa Shoni Bay
• Marsa Shouna
• Marsa Tondoba
• Marsa Umm Gerifat South
• Marsalforn Bay
• Martelo
• Martha's Quarry
• Martin Island
• Martini Rock
• Martini Wall
• Marty’s Cave
• Mashraba
• Massa D'or
• Massa ďOr
• Matahari Reef, Pulau Seribu, Jakarta
• Mataking Wreck Post
• Matapalo Rock
• Mataranka Thermal Pool and Rainbow Springs
• Matherson Bay
• Matiu-somes Wharf
• Matterhorn
• Mattsee
• Mawan
• Maycocks - Sand Channels
• Mayne Reef
• Mayne Rock
• Mbwangawa
• Mcabee
• Mckenzies Beach
• Mıddle Tree
• Medfish
• Medfish Confined Water
• Medfish Deep OW - 40m
• Medfish Deep OW - 60m
• Medfish OW - 30m
• Medfish Pool Gokcebel
• Medhu Faru
• Medhu Kandu
• Medina
• Medregal Point
• Meelup Beach
• Mejean
• Melanda
• Melanda Beach
• Melanda Heights
• Melasti
• Melasti Tulamben
• Mele Reef
• Melina Island
• Melissa's Garden
• Melissa's Reef
• Mel’s rock
• Menjangan Island
• Mercedes I
• Mercers Lake
• Mercers Lake - Redhill
• Mercy Jesus
• Meridian (Wreck)
• Meridiana
• Merkanti Reef (Divewise House Reef)
• Mermaid Cove
• Mermaid Wall, Mermaid Reef
• Mermaid's Grotto
• Mermaids Kitchen
• Mermet Springs
• Mermet Springs, Il
• Mersinia B
• Mersinia S
• Messina
• Messinghausen See im Berg
• Messinghausen See im Berg
• Mesudiye Wreck
• Metlikova
• Mettams Pool
• Mezzatorre
• M/f Aerosund Ferry
• Mgarr Ix-xini
• Mid Reef
• Middle Arch
• Middle Finger
• Middle Garden
• Middle Island
• Middle Reef Safaga
• Middle Rocks (Cagnipa Island)
• Middle Stone
• Mikes Cupboard
• Mike's Maze
• Mike's Point
• Mike's Point
• Mikey's Ear
• Mikomoto Island
• Mikros Mourtias Beach
• ¼ Mile Reef
• Milet
• Milimani South
• Mill Cove Beach
• Mill Cove Marina
• Mill Cove Wharf Beach Side
• Mill Cove Wharf Jetty Side
• Millers Point
• Milligerplas
• Million Dollar Point
• Milln Reef
• Millyering Wall
• Mina Cristal
• Minabe Syougase
• Minerva Ledge
• Mines of Moai
• Mingo Mounds
• Mingo Pass
• Mini-blue Hole
• Mini Wall
• Mioskon
• Miracle Waters
• Misery Beach
• Mistaken Island
• Mitsio Wreck
• Miyaru Kandu
• M&K Reef
• Mnemba Sandbanks
• Mobulas Hot Spot
• Moc-che
• Mogan West
• Mohawk Deer
• Molas Shipwreck
• Molokini Back Wall
• Momo Beach
• Monem Wreck
• Monkey Beach
• Monkey Cave
• Monkey Mia Jetty
• Monkey Reef
• Monkey Rock
• Monkeys Cave
• Mononaftis
• Mononaftis, Kreta
• Montaña Amarilla
• Montaña Guaza
• Montaña Hundida
• Montaña Roja
• Montague Island
• Montiell / Conger Reef
• Monumento Natural das Ilhas Cagarras
• Moofushi Shark Corner
• Moon Hole
• Moon Pool / Pozo de la Luna
• Moore Reef
• Moray Beach
• Moray Garden
• Moray Point
• Moray Reef and Surrounds
• Morries Maze
• Morrito Largo
• Morrito Largo Tec
• Morro das Pedras
• Morro de Toix
• Morro Tejon
• Morros Maguey
• Mortar Rock
• Mosh Wall
• Moso Drift Dive
• Mosquera
• Mosquito Fighter Bomber
• Moto
• Mount K Avenue
• Mountain of Fishes
• Mourtias Reef
• Mpai Bay
• Mérouville
• Mrowiny
• Ms Jojo
• Ms Mikhail Lermontov Wreck
• Mt. Point
• Muka Kampung
• Mulo lighthouse
• Mun Nai Jetty
• Munko's Garden
• Muraka Giri
• Murata di Sant'Agostino
• Murex House Reef
• Murner See - Bucht
• Murner See Rutschn
• Murner See - Rutsch'n
• Murner See - Turm
• Muro Wall
• Murrays Beach
• Musa Cancun Underwater Museum
• Musan
• Museo Atlantico
• Museum of Underwater Art (Moua) at John Brewer Reef
• Mushroom Garden
• Mushroom Rock
• Mustafa Reef
• Muttonbird Beach
• Muyuni Plate Corals
• Muzil
• Mv Alpha Funguo
• MV Equa (Wreck)
• M/v Giannoula K. - Plimmiri
• Mv Henry Bonnaud
• MV Imperial Eagle, wreck
• MV Malabar
• Mv New Marine
• Mv Pippo
• Mv Xlendi
• Mwana Wa Mwana
• Mwanamoji
• Mylopotas Shore Reef
• Myrmix and Lefteris – the Vera Shipwreck
• Mystery Bay
• Mystery Wreck Callala Beach