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    Obelia hydrozoan medusa. Light micrograph (LM) of a medusa (young polyp) from the Obelia geniculata hydroid. — Stock Photo
    Obelia hydrozoan medusa. Light micrograph (LM) of a medusa (young polyp) from the Obelia geniculata hydroid.
    Popcorn shrimp on anemone — Stock Photo
    Popcorn shrimp on anemone
    Spotted grouper in Beqa Lagoon — Stock Photo
    Spotted grouper in Beqa Lagoon
    Moray eel on coral reef — Stock Photo
    Moray eel on coral reef
    Scribbled filefish swimming in blue water — Stock Photo
    Scribbled filefish swimming in blue water
    Corals covering reef in Beqa Lagoon — Stock Photo
    Corals covering reef in Beqa Lagoon
    Mushroom coral growing on reef — Stock Photo
    Mushroom coral growing on reef
    Colorful fish swimming over reef — Stock Photo
    Colorful fish swimming over reef
    Closeup of tropical marine bright green Solenostomus halimeda or Halimeda ghostpipefish fish floating in transparent water over sandy seabed — Stock Photo
    Closeup of tropical marine bright green Solenostomus halimeda or Halimeda ghostpipefish fish floating in transparent water over sandy seabed
    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
    Mimicing scorpionfish closeup headshot — Stock Photo
    Mimicing scorpionfish closeup headshot
    Red tree coral on reef — Stock Photo
    Red tree coral on reef
    Closeup wild Diogenes crab with big green eyes and long antennas sitting in deep seawater — Stock Photo
    Closeup wild Diogenes crab with big green eyes and long antennas sitting in deep seawater
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Gold-specs jawfish in hole — Stock Photo
    Gold-specs jawfish in hole
    Soft corals thriving on deep reef — Stock Photo
    Soft corals thriving on deep reef
    Soft coral and sea fan — Stock Photo
    Soft coral and sea fan
    Bull shark surrounded by fish — Stock Photo
    Bull shark surrounded by fish
    Fragile corals in shallow water in Raja Ampat, Indonesia — Stock Photo
    Fragile corals in shallow water in Raja Ampat, Indonesia
    Black spiny urchins on sandy seafloor — Stock Photo
    Black spiny urchins on sandy seafloor
    Coral colony fluorescing in ultraviolet light — Stock Photo
    Coral colony fluorescing in ultraviolet light
    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.
    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
    Yellow sea fan in Raja Ampat — Stock Photo
    Yellow sea fan in Raja Ampat
    Goliath Grouper floating over shipwreck — Stock Photo
    Goliath Grouper floating over shipwreck
    Porcelain crabs on host anemone — Stock Photo
    Porcelain crabs on host anemone