Juergen Freund / Mushroom leather coral (Sarcophyton sp) Bali, Indo-pacific.

Constantinos Petrinos / Giant frogfish {Antennarius commerson} on Mushroom Leather coral, Sulawesi, Indonesia

Jeff Rotman / Mushroom coral {Fungia fungites} Red Sea

Chris Newbert / Mushroom Coral (Fungia fungites) detail, Palau

Jeff Rotman / Mushroom coral {Fungia sp.} Palau Islands, Pacific Ocean

Michael Pitts / Mushroom leather coral feeding at night, Yap. Micronesia.

Constantinos Petrinos / Mushroom coral detail {Fungia fungites} Sulawesi Indonesia

Juergen Freund / Mushroom coral {Fungia sp.} skeleton from the Philippines

Georgette Douwma / Mushroom coral (Fungia fungites) abstract close up view, Thailand, Andaman Sea

Georgette Douwma / Mushroom corals (Fungia fungites) on rubble bottom of reef under other corals, Maldives, Indian Ocean

Suzi Eszterhas / Coral fungus growing on rainforest floor, Danum Valley Conservation Area, Malaysia

Juergen Freund / Details of Mushroom coral (Fungia sp) with polyps out, Komodo NP, Indonesia.

Juergen Freund / Mushroom leather coral (Sarcophyton sp) on coral reef, West Papua, Indonesia.

Juergen Freund / Nudibranch (Chromodoris annae) with Mushroom coral in the background. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Mushroom leather coral polyps (Sarcophyton sp.). Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Field of Mushroom corals (Fungia sp.). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Mushroom coral ghost shrimps / Anemone shrimps (Periclimenes kororensis), always found in association with mushroom corals (Heliofungia sp.) or sea anemones. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Mushroom coral (Fungia sp.) on the rubble. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Mushroom coral (Fungia scutaria) in the reef rubble. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Mushroom Coral (Fungia sp.). Rinca, Komodo National Park, Indonesia, October.

GEORGETTE DOUWMA / Mushroom coral {Heliofungia actiniformis} with Acoel flatworms {Waminoa sp} Bunaken, Sulawesi, Indonesia

Sue Daly / Mushroom coral (Fungia sp) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Mushroom coral (Fungia sp) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Close up of polyps of Mushroom coral (Fungia sp) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Mushroom coral (Fungia sp) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Close up of underside of Hard mushroom coral (Podabacia sp) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Mushroom leather coral (Sarcophyton sp) Cebu, Philippines, March

Ingo Arndt / Rock islands covered with rainforest, the limestone islands have been eroded into mushroom-like formations, Palau

Ingo Arndt / Rock islands covered with rainforest, the limestone islands have been eroded into mushroom-like formations, Palau

Fred Bavendam / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) pair among crinoids, Bali, Indonesia

Fred Bavendam / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) group, Bali, Indonesia

Fred Bavendam / Mushroom Coral (Fungia repanda) with its tentacles extended at night to capture food, Lizard Island, Great Barrier Reef, Australia

Chris Newbert / Mushroom Coral (Heliofungia actiniformis), Indonesia

Chris Newbert / Mushroom Coral (Fungia scutaria) detail, Indonesia

Chris Newbert / Mushroom Coral (Heliofungia actiniformis), Indonesia

Chris Newbert / Mushroom Coral (Fungia scutaria) detail, Indonesia

Georgette Douwma / Acoel flatworms (Waminoa sp.) on mushroom coral tentacles. Rinca, Indonesia.

Norbert Wu / Mushroom Coral (Fungiidae) don't show flourescence as much when illuminated by the light of a camera flash, 40 feet deep, Komodo Island, Indonesia. Sequence 2 of 2

Norbert Wu / Mushroom Coral (Fungiidae) show fluorescence (and not) under normal daylight filtered by seaswater, 40 feet deep, Komodo Island, Indonesia. Sequence 1 of 2

Chris Newbert / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) detail, Papua New Guinea

GEORGETTE DOUWMA / Mushroom coral (Fungia sp.) on sand, Bali, Indonesia

GEORGETTE DOUWMA / Mushroom coral (Fungia sp.) on sand, Bali, Indonesia

GEORGETTE DOUWMA / Mushroom coral (Heliofungia actiniformis) with polyps extended, Bunaken, Sulawesi, Indonesia.

GEORGETTE DOUWMA / Close up of Mushroom coral (Heliofungia actiniformis) with polyps partially retracted. Bunaken, Sulawesi, Indonesia.

Juergen Freund / Mushroom coral (Fungia genus), Queensland, Australia

Norbert Wu / Giant Cup Mushroom Coral (Amplexidiscus fenestrafer) closely related to sea anemones, Raja Ampat Islands, Indonesia

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

Juergen Freund / Coral goby {Pleurosicya mossambica} in mushroom coral, Philippines

JEFF FOOTT / Mushroom coral feeding at night (Anthomastus ritteri), Pacific, California, USA

GEORGETTE DOUWMA / Acoelous flatworms {Waminoa sp} on tentacles of Mushroom coral {Heliofungia actiniformis} Sulawesi, Indonesia

Constantinos Petrinos / Close up of Mushroom coral (Fungia fungites) Sulawesi, Indonesia

Constantinos Petrinos / Close up of Mushroom coral (Fungia sp) Red Sea, Egypt

GEORGETTE DOUWMA / Mushroom coral {Fungia sp.} Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Mushroom coral {Fungia sp.} Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Mushroom coral {Fungia sp.} Lembeh Strait, North Sulawesi, Indonesia.

Chris Newbert / Mushroom Coral (Fungia fungites) detail, Truk Lagoon, Micronesia

Norbert Wu / Mushroom Coral (Fungiidae) growing together in shallow water, Indonesia

Norbert Wu / Mushroom Soft Coral (Anthomastus ritteri) deep sea species is white due to lack of any symbiotic algae (Zooxanthellae) in body, Monterey, California

Norbert Wu / Mushroom Soft Coral (Anthomastus ritteri) deep sea species is white due to lack of any symbiotic algae (Zooxanthellae) in body, Monterey, California

Constantinos Petrinos / Common egg ovula / Cowry {Ovula ovum} feeding on Mushroom leather {Sarcophyton sp}

Carine Schrurs / Veined octopus {Octopus marginatus} using sea shell and mushroom coral for cover. Lembeh strait, Sulawesi, Indonesia

Carine Schrurs / Warted egg cowries {Calpurnus verrucosus} feed on Mushroom leather coral {Sarcophyton sp} Philippines

Constantinos Petrinos / Common Cowry {Ovula ovum} feeding on Mushroom leather coral {Sarcophyton sp} Lembeh Strait, Sulawesi Indonesia

Constantinos Petrinos / Mushroom coral {Fungia costulata} Sulawesi, Indonesia

Juergen Freund / Mushroom coral {Fungia fungites} Philippines, Pacific

Sue Daly / Mushroom coral (Fungia sp) Borneo, Indonesia

Roberto Rinaldi / Mushroom coral (Fungia sp) fluorescence at night, captured using an electronic strobe, Red Sea.

Roberto Rinaldi / Mushroom coral (fungia fungites), Philippines.

Roberto Rinaldi / Coral (Fungia sp) at night. This image is photographed with a normal camera as a comparison with image 8118531, Red Sea.

Roberto Rinaldi / Detail of a coral anemone (Corallimorpharia), Kudat, Sabah, Borneo

Roberto Rinaldi / Coral (Fungia sp) fluorescence at night, captured using very powerful electronic strobes. This image is a comparison with image 8118530, Red Sea

Roberto Rinaldi / Coral (Fungia sp) fluorescence at night, captured using a very powerful electronic strobe. The black part is a portion of the animal which is dead, Red Sea

Constantinos Petrinos / Giant frogfish {Antennarius commerson} on mushroom leather coral {Sarcophyton sp} Sulawesi, Indonesia

Michael Pitts / Mushroom corals (Alcyonacea) growing on Japanese World Wat Two shipwreck in Truk Lagoon, Micronesia

Chris Newbert / Mushroom Coral (Fungia sp) detail, Solomon Islands

Carine Schrurs / Warted egg cowrie {Calpurnus verrucosus} feeds on Mushroom leather coral. Philippines

GEORGETTE DOUWMA / Mushroom corals {Fungia genus} Similan Islands Andaman Sea Thailand Indian Ocean