Franco Banfi / Loggerhead turtle (Caretta caretta) accompanied by pilotfish (Naucrates ductor) swimming near the surface. Vulnerable. Santa Maria Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Atlantic spotted dolphins, (Stenella frontalis), Formigas Islet dive site, Santa Maria Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Tail of Blue whale diving (Balaenoptera musculus brevicauda) possibly the pygmy sub-species of blue whale, (Balaenoptera musculus). Mirissa, Sri Lanka, Indian Ocean. Photo taken under permit

Franco Banfi / Tail of Blue whale (Balaenoptera musculus brevicauda). This may be the pygmy sub-species of blue whale, Balaenoptera musculus. Mirissa, Sri Lanka, Indian Ocean

Franco Banfi / Conger eel, (Conger conger) on Teti shipwreck which sank on a stormy night on 23 May 1930, Komiza, Vis Island, Croatia, Adriatic Sea. .

Franco Banfi / Tiger moray / Fangtooth Moray (Enchelycore anatina), South Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Tiger moray / Fangtooth Moray (Enchelycore anatina) and Black moray eel (Muraena augusti), South Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Bull ray (Pteromylaeus bovinus), South Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Green turtle (Chelonia mydas), South Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Bull ray (Pteromylaeus bovinus), South Tenerife, Canary Islands, Atlantic Ocean.

Franco Banfi / Blue shark (Prionace glauca) and Pilot fish (Naucrates ductor), Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Blue shark (Prionace glauca) with fishing hook caught in mouth and Pilot fish (Naucrates ductor), Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Short-finned pilot whale (Globicephala macrorhynchus) female carrying dead calf, South Tenerife, Canary Islands, Atlantic Ocean. Runner-up in Underwater Worlds category of MontPhoto competition 2020.

Franco Banfi / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin surfacing. South Tenerife, Canary Islands, Atlantic Ocean

Franco Banfi / Cuckoo wrasse (Labrus mixtus) male in front of Red sea fan, (Paramuricea clavata), Stupiste In dive site, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Octopus, (Octopus vulgaris), splashing a cloud of ink and swim away with Bearded fireworm, (Hermodice carunculata) who want to eat a small octopus, top of the wall of Bisevo, Vis Island, Croatia, Adri...

Franco Banfi / Sleeping sperm whale, (Physeter macrocephalus) Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Sperm whale, (Physeter macrocephalus) Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Pod of sperm whale socializing, (Physeter macrocephalus), Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Floating, abandoned net in the ocean, Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Striped marlin (Kajikia audax) hunting Sardine (Sardinops sagax) in bait ball. Magdalena Bay, Baja California Sur, Mexico.

Franco Banfi / California sealion (Zalophus californianus) swimming. Magdalena Bay, Baja California Sur, Pacific Ocean, Mexico

Franco Banfi / Striped marlin (Tetrapturus audax) feeding on Sardine (Sardinops sagax). Magdalena Bay, Baja California Sur, Pacific Ocean, Mexico.

Franco Banfi / School of Munk's devil ray, pygmy devil ray, (Mobula munkiana), feeding on plankton at night, photographed on a long exposure, Espiritu Santo Island, Sea of Cortez, Baja California, Mexico, East Pacif...

Franco Banfi / Sperm whale (Physeter macrocephalus) young male trying to copulate with a female. The calf of the female was in the way so the male is trying to chase it away. Dominica.

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Diver exploring an iceberg in Greenland Sea. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Sugar kelp (Saccharina latissima) and Sea anemones (Actiniaria) on rock near iceberg. Tasiilaq, East Greenland. April.

Franco Banfi / Sugar kelp (Saccharina latissima) near iceberg, view upwards to gap in sea ice. Tasiilaq, East Greenland. April.

Franco Banfi / Scuba diver exploring El Eden cenote. Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Water lilies at the surface in Cenote Nicte-Ha,Tulum, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Water lilies at the surface in Cenote Nicte-Ha,Tulum, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Freshwater fish including Cichlid between water plants and leaves. Cenote Nicte-Ha, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Freshwater fishes including Cichlid between water plants and leaves. Cenote Nicte-Ha, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Freshwater turtle (Trachemys scripta venusta) swimming amongst Water lilies leaves, Gran Cenote, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Close view of a Green anaconda, (Eunectes murinus) underwater, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Bryde's whale (Balaenoptera edeni) Trincomalee, Eastern Province, Sri Lanka, Bay of Bengal, Indian Ocean

Franco Banfi / Bryde's whale (Balaenoptera edeni) tail, Trincomalee, Eastern Province, Sri Lanka, Bay of Bengal, Indian Ocean

Franco Banfi / Sperm whale (Physeter macrocephalus) pod, Dominica, Caribbean Sea, Atlantic Ocean, January, Vulnerable species.

Franco Banfi / Sperm whales (Physeter macrocephalus) socialising with free diver stopped between two individuals, Dominica, Caribbean Sea, Atlantic Ocean, January, Vulnerable species. Model released.

Franco Banfi / Sperm whale (Physeter macrocephalus) tail below water as whale surfaces, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable species.

Franco Banfi / Sperm whale (Physeter macrocephalus) portrait, with remora fish, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable.

Franco Banfi / Sperm whale (Physeter macrocephalus) mother surfacing with calf below, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable species.

Franco Banfi / Three False clownfish (Amphiprion ocellaris) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) group resting in coral reef, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Sea star (Hacelia attenuata) on coral covered with mucilage, a symptom of rising sea temperature, Vis Island, Croatia, Adriatic Sea, Mediterranean.

Franco Banfi / Humboldt squid (Dosidicus gigas) attracted to 'squid jig' bait which glows at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.

Franco Banfi / Humboldt squid (Dosidicus gigas) at night off Loreto, Sea of Cortez, Baja California, Mexico, East Pacific Ocean.