Georgette Douwma / Green turtle (Chelonia mydas) feeding on soft corals. Egypt, Red Sea.

Georgette Douwma / Red rope sponge (Amphimedon compressa) Egypt, Red Sea.

Georgette Douwma / Soft corals (Dendronephthya sp.) growing on sandy bottom. Indonesia.

Georgette Douwma / Soft corals (Dendronephthya sp.) growing on sandy bottom. Indonesia.

Georgette Douwma / Papuan puffer (Canthigaster papua) with a cleaner shrimp (Periclemenes magnificus) Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Greenband / Red Sea parrotfish (Scarus collana) browsing on filamentous algae growing on sand . Egypt, Red Sea.

Georgette Douwma / Swarthy / Dusky parrotfish (Scarus niger) grazing. Egypt, Red Sea.

Georgette Douwma / Longnose parrotfish (Hipposcarus harid) Egypt, Red Sea.

Georgette Douwma / Longnose parrotfish (Hipposcarus harid) browsing on filamentous algae growing on sand. Egypt, Red Sea.

Georgette Douwma / Red Sea Coral Grouper (Plectropomus pessuliferus marisrubri) Egypt, Red Sea.

Georgette Douwma / Red Sea Coral Grouper (Plectropomus pessuliferus marisrubri) Egypt, Red Sea.

Georgette Douwma / Yellowsaddle goatfish (Parupeneus cyclostomus) hunting small prey in coral branches. Egypt, Red Sea.

Georgette Douwma / Dash-and-dot goatfish (Parupeneus barberinus) Egypt, Red Sea.

Georgette Douwma / Spangled emperor (Lethrinus nebulosus) watching a Blue spotted ribbontail ray (Taeniura lymna) that is burrowing in the sandy bottom for prey. Egypt, Red Sea.

Georgette Douwma / Beaufort crocodile fish (Cymbacephalus beauforti) under coral overhang on sandy bottom. Egytp, Red Sea.

Georgette Douwma / Coral (Stylophora subseriata) Egypt, Red Sea.

Georgette Douwma / Acropora coral, Egypt, Red Sea.

Georgette Douwma / Fluted giant clam (Tridacna squamosa) Egypt, Red Sea.

Michele Westmorland / Triton mollusk (unidentified) with foot exposed. Galapagos Islands.

Jeff Rotman / Peacock flounder (Bothus lunatus) on the sea floor of Lembeh Strait, Celebes Sea, Sulawesi, Indonesia.

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying in a hole amongst corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surfa...

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying in a hole amongst corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surfa...

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying in a hole amongst corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surfa...

Georgette Douwma / Reef stonefish (Synanceia verrucosa) in a mating congregation, the males jostling for position and swimming over the females. The female stonefish releases its eggs on the bottom of the sea floor, th...

Georgette Douwma / A group of Reef stonefish (Synanceia verrucosa) in a mating congregation, the males jostling for position and swimming over the females. The female stonefish releases its eggs on the bottom of the se...

Georgette Douwma / A group of five Reef stonefish (Synanceia verrucosa) in a mating congregation, the males jostling for position and swimming over the females. The female stonefish releases its eggs on the bottom of t...

Georgette Douwma / A group of five Reef stonefish (Synanceia verrucosa) in a mating congregation, the males jostling for position and swimming over the females. The female stonefish releases its eggs on the bottom of t...

Georgette Douwma / A group of six Reef stonefish (Synanceia verrucosa) in a mating congregation, the males jostling for position and swimming over the females. The female stonefish releases its eggs on the bottom of th...

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying on top of corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surface and m...

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying in a hole amongst corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surfa...

Georgette Douwma / Stonefish (Synanceia verrucosa) well camouflaged overgrown with algae, lying in a hole amongst corals. Algae (including macroalgae, like Padina) and sessile invertebrates often grow on its body surfa...

Georgette Douwma / Stonefish (Synanceia verrucosa). This individual, having just shed its cuticle, is vivid pink, red and purple, resembling a coralline algae encrusted rock. It is one of the most venomous fish curren...

Alex Mustard / Tassled wobbegong shark (Eucrossorhinus dasypogon) swimming over Coral reef. Raja Ampat, West Papua, Indonesia. Dampier Strait, Tropical West Pacific Ocean.

Alex Mustard / Tassled wobbegong shark (Eucrossorhinus dasypogon) swimming over Coral reef. Raja Ampat, West Papua, Indonesia. Dampier Strait, Tropical West Pacific Ocean.

Alex Mustard / Tassled wobbegong shark (Eucrossorhinus dasypogon) resting under Coral head, covered in orange soft corals. Dampier Strait, Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean

Alex Mustard / Long exposure of a Tassled wobbegong shark (Eucrossorhinus dasypogon) swimming across Coral reef. Dampier Strait, Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean.

Alex Mustard / Divers watch a Tassled wobbegong shark (Eucrossorhinus dasypogon) as it swims over Coral reef. Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean.

Alex Mustard / Tassled wobbegong shark (Eucrossorhinus dasypogon) resting under coral, covered in orange soft corals. Dampier Strait, Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean.

Alex Mustard / Tassled wobbegong shark (Eucrossorhinus dasypogon) resting under coral, covered in orange soft corals. Dampier Strait, Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean.

Alex Mustard / Female Veined octopus (Amphioctopus marginatus) broods her eggs, wrapped in her arms, while she lies protected in an old giant clam shell. Manado, North Sulawesi, Indonesia. Sulawesi Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) using two halves of a coconut as a home. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) using two halves of a coconut as a home. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Wonderpus octopus (Wunderpus photogenicus) explores the seabed in search of prey. Lembeh Strait, North Sulawesi, Indonesia. Molluca Sea

Alex Mustard / Yellow seahorse (Hippocampus kuda) swims across open sand. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Portrait of a Flamboyant cuttlefish (Metasepia pfefferi) as it prowls across the sand. This species generally prefers to walk, than swim. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) shelters in an empty clam shell. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) shelters in an empty clam shell. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) shelters in an empty clam shell. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) crosses the sand to take shelter in an empty clam shell. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Alex Mustard / Wonderpus octopus (Wunderpus photogenicus) moves over the seabed. Lembeh Strait, North Sulawesi, Indonesia. Molluca Sea.

Alex Mustard / Wonderpus octopus (Wunderpus photogenicus) explores the seabed in search of prey. Lembeh Strait, North Sulawesi, Indonesia. Molluca Sea

Alex Mustard / A wonderpus octopus (Wunderpus photogenicus) explores the seabed in search of prey. Lembeh Strait, North Sulawesi, Indonesia. Molluca Sea

Alex Mustard / Poison ocellate octopus (Amphioctopus siamensis) moves across the sand. When disturbed, this species advertises its poisonous nature by flashing Blue ring on the dark patch beneath the eye. Lembeh Str...

Alex Mustard / Portrait of a Flamboyant cuttlefish (Metasepia pfefferi) as it prowls across the sand. This species generally prefers to walk, than swim. Lembeh Strait, North Sulawesi, Indonesia. Molucca Sea.

Franco Banfi / Sea star (Hacelia attenuata) on a rock close to Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Seagrass Meadows (Posidonia oceanica) close to Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Conger eel (Conger conger) on Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Forkbeard (Phycis phycis) on Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Scuba diver and Forkbeard (Phycis phycis) on Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Pillow coral (Cladocora caespitosa) the white part is damaged, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Pillow coral (Cladocora caespitosa) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Inflorescence of Neptune grass (Posidonia oceanica) seagrass meadow, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Pen shell (Pinna nobilis) in seagrass meadow of Nepture grass (Posidonia oceanica), Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Neptune grass (Posidonia oceanica) with flower, and encrusting algae, Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Scuba diver with sea star (Hacelia attenuata) and Red sea star (Echinaster sepositus) Wall of Bisevo, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Banded shrimpgoby (Cryptocentrus cinctus) sharing burrow with Alpheus shrimp (Apheus sp) Cendana Jetty, Waigeo island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Nudibranch (Tambja affinis) feeding on another nudibranch, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Mantis shrimp (Odontodactylus scyllarus) in burrow, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Conch (Strombus thersites) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Sea pen, (Pteroeides sp.) , Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean