Juergen Freund / Close-up of an Acropora coral, Indo-pacific

Juergen Freund / Close-up of an Acropora coral, Indo-pacific

Juergen Freund / Close-up of an Acropora coral, Indo-pacific

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) on fan coral, Pacific

Juergen Freund / Coral spawning in the Great Barrier Reef happens every year in November, 3 - 5 days after full moon, Great Barrier Reef, Queensland, Australia

Juergen Freund / Whip coral growing up through Hard coral, fight for survival, Indo-Pacific

Juergen Freund / Juvenile corals {Acropora sp} Great Barrier Reef, Australia, Indo-pacific

Juergen Freund / Diver watching Australian spotted jellyfish (Phyllorhiza punctata), Rowley Shoals, Western Australia

Juergen Freund / Colourful gorgonian sea fan (Gorgonacea) and soft corals, with small fish, and a diver in the background. Rowley Shoals, Western Australia

Juergen Freund / Oceanic box jellyfish (Alatina mordens) larvae, Australia

Juergen Freund / Colourful gorgonian sea fan (Gorgonacea) and soft corals, with diver in the background. Rowley Shoals, Western Australia

Juergen Freund / Gorgonian sea fan (Gorgonacea) and soft corals, with fish in the background. Rowley Shoals, Western Australia

Juergen Freund / Colourful gorgonian sea fan (Gorgonacea) and soft corals, with diver in the background. Rowley Shoals, Western Australia

Jurgen Freund / Whip corals (Ellisella sp), with diver in the background. Rowley Shoals, Western Australia

Juergen Freund / Colourful gorgonian sea fan (Gorgonacea) and soft corals, with diver in the background. Rowley Shoals, Western Australia

Juergen Freund / Gorgonian sea fan (Gorgonacea) with diver in the background. Rowley Shoals, Western Australia

Juergen Freund / Soft Coral {Alcyonacea} on rock, Philippines

Juergen Freund / Fishing net tangled over coral reef, Indo-pacific

Juergen Freund / Diver over Cabbage coral field {Turbinaria sp} Indo-Pacific

Juergen Freund / Diver behind large Sea fan coral, Cuba, Caribbean

Juergen Freund / Close up detail of Venus sea fan {Gorgonia flabellum} Caribbean

Juergen Freund / Fan coral {Subergorgia mollis} Philippines

Juergen Freund / Fan coral {Subergorgia mollis} Philippines

Juergen Freund / Silhouette of diver behind large Sea fan coral {Gorgonia flabellum} Caribbean

Juergen Freund / Sea fan coral {Gorgonacea} with Reef basselets {Grammidae} Philippines

Juergen Freund / Fan coral {Subergorgia mollis} with Feather star attached, Philippines

Juergen Freund / Mushroom coral {Anthomastus ritteri} deepsea, 300 - 800 m, Pacific

Juergen Freund / Fan coral {Subergorgia mollis} Philippines

Juergen Freund / Close up of mouth of Sea anemone {Heteractis aurora} Indo pacific

Juergen Freund / Corallimorph {Pseudocorynactis sp} Indo pacific

Juergen Freund / Close up of trunk of Alicia sea anemone {Alicia mirabilis} Mediterranean

Juergen Freund / Colonial sea anemones {Actiniaria} on Whip coral skeleton, Indo pacific

Juergen Freund / Tube anemone {Cereanthus membranaceus} Mediterranean

Juergen Freund / Close up of trunk of Alicia sea anemone {Alicia mirabilis} Mediterranean

Juergen Freund / Soft coral {Dendronephthya sp} Indo pacific

Juergen Freund / Sea anemone {Tealia lofotensis} and Sea urchin, Canada, Pacific coast

Juergen Freund / Close up of trunk of Alicia sea anemone {Alicia mirabilis}, Mediterranean

Juergen Freund / Tube anemone {Cereanthus sp} Mediterranean

Juergen Freund / Soft coral {Dendronephthya sp} Indo pacific

Juergen Freund / Tube anemone {Cereanthus sp} Mediterranean

Juergen Freund / Soft coral {Minabea aldersladei} polyps feeding at night, Indo pacific

Juergen Freund / Diamond blenny {Malacoctenus boehlkei} amongst tentacles of Sea anemone, Caribbean

Juergen Freund / Diamond blenny {Malacoctenus boehlkei} amongst tentacles of Sea anemone, Caribbean

Juergen Freund / Gorgonian coral (Gorganacea) and sponge Philippines, South Pacific

Juergen Freund / Eggs of Damselfish (Pomacentridae) along whip coral, Indo-Pacific

Juergen Freund / Coral polyps of stony coral feeding at night (Scleractinia) Carribean Sea

Juergen Freund / Alicia anemone (Alicia mirabilis) Mediterranean Sea

Juergen Freund / Whip coral and diver (Stichopathes) Indo-Pacific

Juergen Freund / Close up of stone coral (Favites sp), polys closed, Indo Pacific

Juergen Freund / Hard coral (Mycedium elephantotus) Philippines

Juergen Freund / Close up of Hard coral (Mycedium elephantotus) Philippines

Juergen Freund / Tube coral (Dendrophyllia sp) with polyps extended, Indo Pacific

Juergen Freund / Alicia anemone {Alicia mirabilis} Mediterranean

Juergen Freund / Gorgonia Sea fan {Subergorgia mollis} Indo Pacific

Juergen Freund / Bags of Sea anemones for sale for food, Tawi, Philippines

Juergen Freund / Featherstar in Fan coral {Milleporidaae} Indo-Pacific

Juergen Freund / Detail of Mycedium coral {Mycedium elephantotus} Indo-Pacific

Juergen Freund / Daisy coral {Goniopora sp} with polyps open, Indo-Pacific

Juergen Freund / Xenia coral polyps {Xenia sp} Indo-Pacific

Juergen Freund / Detail of Mycedium coral {Mycedium elephantotus} Indo-Pacific

Juergen Freund / Tube corals {Tubastrea faulkneri} with polyps open, Indo-Pacific

Juergen Freund / Tube anemone {Ceranthidae} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent Hard coral {Heliofungia actiniformis} seen under normal light, Papua New Guinea

Juergen Freund / Chalice coral {Montipora sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Cynarina lacrymalis} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Pectinia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent Hard coral {Lobophyllia sp} in normal light, Papua New Guinea

Juergen Freund / Fluorescent hard corals {Mycedium elephantotus} in normal light, Papua New Guinea

Juergen Freund / Hard coral {Scolymia vitiensis} fluorescent under UV light, Papua New Guinea

Juergen Freund / Soft coral {Scapophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Mycedium elephantotus} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent Hard coral {Lobophyllia sp} in normal light, Papua New Guinea

Juergen Freund / Star coral {Montastrea sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent hard coral {Scolymia sp} in normal light Papua New Guinea

Juergen Freund / Hard coral {Goniastrea palauensis} fluorescent under UV light, Papua New Guinea

Juergen Freund / Colonial hard coral {Euphyllia ancora} Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent Solitary coral {Cynarina lacrymalis} in normal light, Papua New Guinea

Juergen Freund / Tube anemone {Ceranthidae} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard corals {Favia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Fluorescent Hard coral {Goniopora sp} in normal light, Papua New Guinea

Juergen Freund / Hard coral {Scolymia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Soft coral forest and red sea fans, Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Bubble coral with tentacles extended at night {Physogyra lichtensteini} Indo-Pacific

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Diver with sea anemone and clownfish, Papua New Guinea

Juergen Freund / Hard coral {Platygyra sp}, fluorescent under UV light, Great Barrier Reef & Coral Sea, Australia

Juergen Freund / Hard coral {Mycedium elephantotus} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Lobophyllia sp} fluorescent under UV light, Papua New Guinea

Juergen Freund / Tube anemone {Ceranthidae} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Acropora millepora} fluorescent under UV light, Papua New Guinea

Juergen Freund / Hard coral {Stylophora pistillata} fluorescent under UV light, Papua New Guinea