Franco Banfi / Orange elephant ear sponge (Agelas clathrodes) Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Georgette Douwma / Stove-pipe sponge (Aplysina archeri) and Orange elephant ear sponge (Agelas clathrodes) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Alex Mustard / Colourful coral reef wall, with yellow branching tube sponges (Pseudoceratina crassa), brown tube sponges (Agelas conifera) and red rope sponges (Amphimedon compressa), in front of deepwater sea fans...

Franco Banfi / Reef with Orange elephant ear sponge (Agelas clathrodes) and scuba diver on the background, Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean. November 2007.

Georgette Douwma / Orange elephant ear sponge (Agelas clathrodes) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Brown tube sponge (Agelas conifera) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Orange elephant ear sponge (Agelas clathrodes) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Coral reef scenery with Orange elephant ear sponges (Agelas clathrodes), Stove-pipe sponge (Aplysina archeri) and Boulder brain coral (Colpophyllia natans) Bonaire, Netherlands Antilles, Caribbean, A...

Georgette Douwma / Brown tube sponge (Agelas conifera) and Row pore rope sponge (Aplysina cauliformis) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Stove-pipe sponge (Aplysina archeri) and Orange elephant ear sponge (Agelas clathrodes) in background. Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Brown tube sponge (Agelas conifera) and Row pore rope sponge (Aplysina cauliformis) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Brown tube sponge (Agelas conifera) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Orange elephant ear sponge (Agelas clathrodes) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Brown tube sponge (Agelas conifera) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Coral reef scenery with Orange elephant ear sponge (Agelas clathrodes), Stove-pipe sponge (Aplysina archeri) and Azure vase sponge (Callyspongia plicifera) Bonaire, Netherlands Antilles, Caribbean, A...

Pascal Kobeh / Diver above the reef with Caribbean sea whips (Plexaura homomalla), Elephant ear sponge (Agelas clathrodes) and a Great star coral (Montastraea cavernosa), San Salvador Island / Colombus Island, Baham...

Pascal Kobeh / Diver above the reef with Elephant ear sponges (Agelas clathrodes), San Salvador Island / Colombus Island, Bahamas. Caribbean. June 2013.

Pascal Kobeh / Diver on coral reef with Giant barrel sponge (Xestospongia muta), Elephant ear sponge (Agelas clathrodes) and coral, San Salvador Island / Colombus Island, Bahamas. Caribbean. June 2013.

Pascal Kobeh / Diver on coral reef with a Giant barrel sponge (Xestospongia muta), Elephant ear sponge (Agelas clathrodes) and corals, San Salvador Island / Colombus Island, Bahamas. Caribbean. June 2013.

Alex Mustard / Arrow crab (Stenorhynchus seticornis) resting in its home inside a Brown tube sponge (Agelas conifera), Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / Reef scene with Orange elephant ear sponge (Agelas clathrodes), Brown tube sponges (Agelas conifera), Deepwater sea fans (Iciligorgia nodulifera), Creole wrasses (Clepticus parrae) and Fairy basslets...

Alex Mustard / Brown tube sponges (Agelas conifera) on a coral reef, inward lighting image, Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / Sponge spider crab / Decorator crab (Inachus sp) on Sea vases (Ciona intstinalis). Kinlochbervie, Sutherland, The Highlands, Scotland, United Kingdom. Loch Inchard, The Minch, North East Atlantic Ocea...

Alex Mustard / Sponge spider crab / Decorator crab (Inachus sp) clambers over Sea vases (Ciona intstinalis). Kinlochbervie, Sutherland, The Highlands, Scotland, United Kingdom. Loch Inchard, The Minch, North East At...

Alex Mustard / Portrait of an Atlantic goliath grouper (Epinephelus itajara) on a coral reef, with orange clustered sponges (Agelas sp.). Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea...

Alex Mustard / Caribbean reef shark (Carcharhinus perezi) swims past a brown tube sponge (Agelas conifera) growing on a coral reef, while a Nassau grouper (Epinephelus striatus) hides below. Jardines de la Reina, Ga...

Alex Mustard / Diver encountering a Porcupinefish (Diodon hystrix) on a coral reef wall, with Brown tube sponges (Agelas conifera). McCurley's Wall. East End, Grand Cayman, Cayman Islands, British West Indies. C...