BBC Oceans

1. Hydrothermal vents, Bay of Conception 2. Sperm whales, San Pedro Martir 3. Humboldt squid, Loreto 4. Sea lions, Los Islotes 5. Scallop diving, Hell's Channel 6. Wreck of the Fang Ming 7. Hammerhead sharks, El Bajo

1. Sunken valley, South West Tasmania 2. Kelp forests, Fortescue Bay 3. Weedy sea dragons, Waterfall Bay 4. Sea caves and fossils, Waterfall Bay 5. East Australian current 6. Maori octopus, Eaglehawk Bay 7. Wreck of the Nord 8. Fur seals, Tasman Island 9. Rock lobsters, St Helens

1. Oceanic rift in the Gulf of Tadjoura 2. Heat tolerant corals, Eritrean Reef 3. Fluorescent corals 4. Conshelf II, the underwater village 5. Wreck of the Umbria 6. Rare fish of the Red Sea 7. Human Settlements, Red Sea

1. Black Hole of Andros 2. Lionfish of New Providence Island 3. HMS Southampton 4. South Bimini sharks 5. Lucayan remains of Grand Bahama 6. Stromatolites of Lee Stocking Island 7. The Gulf Stream

1. Manta rays, Tofo 2. Coral nursery 3. Wreck of the Paraportiani 4. Dugong of the Bazaruto Archipelago 5. Shark fishing, Mozambique 6. Argo float

1. The geology of Pemba 2. The coral reefs off Pemba Island 3. Coral coring, Indian Ocean 4. Coconut crabs, south of Zanzibar 5. Seahorses, off Mafia Island 6. Ras Kisimani 7. Whalesharks off Mafia Island

1. Search for the six gill shark 2. The Cala Minnola wreck 3. Underwater volcano, Ferdinandea 4. The search for great white sharks 5. Submerged caves of Mallorca 6. Tuna farms, Mediterranean Sea

1. Examining the pack ice 2. Walrus colony, Poolepynten 3. Arctic's underwater fauna 4. Smeerenburg 5. Beluga whales of Svalbard