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    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans. — Stock Photo
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans.
    Full length marine striped Zebrida crab sitting on soft coral in deep seawater — Stock Photo
    Full length marine striped Zebrida crab sitting on soft coral in deep seawater
    Gorgonians with reef-building corals on reef — Stock Photo
    Gorgonians with reef-building corals on reef
    Dwarf hawkfish on seabed — Stock Photo
    Dwarf hawkfish on seabed
    Group of colorful anemone prawn crawling on uneven coral surface in deep seawater — Stock Photo
    Group of colorful anemone prawn crawling on uneven coral surface in deep seawater
    Colorful reef scene with orange and red dendronephthya, Cenderawasih Bay, West Papua, Indonesia — Stock Photo
    Colorful reef scene with orange and red dendronephthya, Cenderawasih Bay, West Papua, Indonesia
    Clownfish swimming near host anemone — Stock Photo
    Clownfish swimming near host anemone
    Clownfish in green anemone — Stock Photo
    Clownfish in green anemone
    Yellow-spotted scorpionfish on reef — Stock Photo
    Yellow-spotted scorpionfish on reef
    Reef with soft corals and anthias fish — Stock Photo
    Reef with soft corals and anthias fish
    Closeup of tropical marine Parapercis schauinslandii or Redspotted sandperch fish swimming near stony bottom undersea — Stock Photo
    Closeup of tropical marine Parapercis schauinslandii or Redspotted sandperch fish swimming near stony bottom undersea
    Gorgonian growing on diverse coral reef — Stock Photo
    Gorgonian growing on diverse coral reef
    American Eel slithering out of hole — Stock Photo
    American Eel slithering out of hole
    Closeup of exotic tropical Hippocampus histrix or Thorny seahorse on sandy sea bottom with coral reef — Stock Photo
    Closeup of exotic tropical Hippocampus histrix or Thorny seahorse on sandy sea bottom with coral reef
    Tiny head of small spotted sand eel among pebble bottom in clear sea on blurred background — Stock Photo
    Tiny head of small spotted sand eel among pebble bottom in clear sea on blurred background
    Ornate ghost pipefish — Stock Photo
    Ornate ghost pipefish
    Schooling anthias fish and corals — Stock Photo
    Schooling anthias fish and corals
    ETH401326U — Stock Photo
    ETH401326U
    Flatworm feeding on algae — Stock Photo
    Flatworm feeding on algae
    Light brown nudibranch mollusk with white spots and rhinophores crawling on natural reefs in transparent seawater — Stock Photo
    Light brown nudibranch mollusk with white spots and rhinophores crawling on natural reefs in transparent seawater
    Bull shark surrounded by reef fish — Stock Photo
    Bull shark surrounded by reef fish
    Closeup of flock of small transparent fishes underwater in aquarium on colorful blurred background — Stock Photo
    Closeup of flock of small transparent fishes underwater in aquarium on colorful blurred background
    Translucent euphyllia nudibranch with bright white tentacles sitting on coral reef on deep sea bottom — Stock Photo
    Translucent euphyllia nudibranch with bright white tentacles sitting on coral reef on deep sea bottom
    Cup coral polyps under ledge — Stock Photo
    Cup coral polyps under ledge
    Large bull shark — Stock Photo
    Large bull shark
    Dried starfish on pink chair, elevated view — Stock Photo
    Dried starfish on pink chair, elevated view
    Closeup of tropical marine Amblyglyphidodon aureus or Golden damselfish fish swimming among corals in deep sea water — Stock Photo
    Closeup of tropical marine Amblyglyphidodon aureus or Golden damselfish fish swimming among corals in deep sea water
    Moray eel with opened mouth — Stock Photo
    Moray eel with opened mouth
    Goliath Grouper floating over shipwreck — Stock Photo
    Goliath Grouper floating over shipwreck
    Closeup of marine Pristiapogon exostigma or Narrowstripe cardinalfish with stripe on body swimming in tropical ocean water near bottom — Stock Photo
    Closeup of marine Pristiapogon exostigma or Narrowstripe cardinalfish with stripe on body swimming in tropical ocean water near bottom
    Colorful corals on reef near Sulawesi — Stock Photo
    Colorful corals on reef near Sulawesi
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Healthy reef-building corals on reef — Stock Photo
    Healthy reef-building corals on reef
    Gorgonians with reef-building corals on reef — Stock Photo
    Gorgonians with reef-building corals on reef
    Roughtail stingray swimming over seafloor — Stock Photo
    Roughtail stingray swimming over seafloor
    Manta ray swimming in blue water — Stock Photo
    Manta ray swimming in blue water
    Florida largemouth bass — Stock Photo
    Florida largemouth bass
    Closeup of small Acreichthys tomentosus or bristletail filefish swimming among corals near seabed in tropical waters — Stock Photo
    Closeup of small Acreichthys tomentosus or bristletail filefish swimming among corals near seabed in tropical waters
    Red tree coral on reef — Stock Photo
    Red tree coral on reef
    Caribbean reef sharks and goliath grouper — Stock Photo
    Caribbean reef sharks and goliath grouper
    Full length small white crustacean crawling on smooth coral reef in dark seawater — Stock Photo
    Full length small white crustacean crawling on smooth coral reef in dark seawater
    School of juvenile striped eel catfish — Stock Photo
    School of juvenile striped eel catfish
    Giant frogfish closeup headshot — Stock Photo
    Giant frogfish closeup headshot
    Cross section of nautilus shell with spiral structure. — Stock Photo
    Cross section of nautilus shell with spiral structure.
    Corals covering reef in Beqa Lagoon — Stock Photo
    Corals covering reef in Beqa Lagoon
    Juvenile harlequin sweetlips — Stock Photo
    Juvenile harlequin sweetlips
    Diver swimming over soft coral reef — Stock Photo
    Diver swimming over soft coral reef
    Photosynthetic Navicula sp. diatom — Stock Photo
    Photosynthetic Navicula sp. diatom
    Pair of whale sharks swimming near surface — Stock Photo
    Pair of whale sharks swimming near surface
    Whale sharks swimming near fishing nets — Stock Photo
    Whale sharks swimming near fishing nets
    From above closeup orange tentacles of wild Spirobranchus Christmas tree worm in clean water of sea — Stock Photo
    From above closeup orange tentacles of wild Spirobranchus Christmas tree worm in clean water of sea
    Blue tunicate growing on reef — Stock Photo
    Blue tunicate growing on reef
    Translucent light blue nudibranch mollusk with tentacles crawling on natural reef in sea bottom — Stock Photo
    Translucent light blue nudibranch mollusk with tentacles crawling on natural reef in sea bottom
    Scorpionfish hiding among soft corals — Stock Photo
    Scorpionfish hiding among soft corals
    Coral reef growing in shallow water — Stock Photo
    Coral reef growing in shallow water
    Pair nudibranchs on sandy seafloor — Stock Photo
    Pair nudibranchs on sandy seafloor
    Wonderpus octopus on seabed — Stock Photo
    Wonderpus octopus on seabed
    Full body red bodied prawn with long nose swimming in deep seawater near seaweed — Stock Photo
    Full body red bodied prawn with long nose swimming in deep seawater near seaweed
    Soft coral colony on reef — Stock Photo
    Soft coral colony on reef
    Closeup of flock of small transparent fishes underwater in aquarium on colorful blurred background — Stock Photo
    Closeup of flock of small transparent fishes underwater in aquarium on colorful blurred background