Pete Oxford / Pink vase sponge (Niphates digitalis) and Porous sea rods (Pseudoplexaura sp.) Hol Chan Marine Reserve, Belize.

Solvin Zankl / Tube sponge (Niphates callista) on stone coral, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Pete Oxford / Coral (Niphates digitalis), Jardines de la Reina National Park, Cuba

Pete Oxford / Pink Vase Sponge (Niphates digitalis) on coral reef, Belize Barrier Reef, Belize

Pete Oxford / Pink Vase Sponge (Niphates digitalis), Xcalak National Reef Park, Mahahual, Quintana Roo, Mexico

Roberto Rinaldi / Pink vase sponges (Niphates digitalis) on reef, Roatan, Honduras.

Roberto Rinaldi / Vase sponge (Niphates digitalis) with diver, Roatan, Honduras.

Roberto Rinaldi / Great star coral / large star coral in the foreground with a pink vase sponge (Niphates digitalis) behind, Honduras.

Roberto Rinaldi / Red rope sponge (Amphimedon compressa), Pink vase sponge (Niphates digitalis) and a scuba diver with a torch between two underwater pinnacles, Lighthouse Reef Atoll, Belize Model released.

Roberto Rinaldi / Red rope sponge (Amphimedon compressa) and a Pink vase sponge (Niphates digitalis) with a scuba diver holding a torch in the background, Lighthouse Reef Atoll, Belize Model released.

Roberto Rinaldi / Pink vase sponge (Niphates digitalis) on a wall, Cayman Islands.

Claudio Contreras / Sponge brittle star (Ophiothrix suensonii) over Pink Vase sponge (Niphates digitalis), Sponge zoanthid (Parazoanthus parasiticus) colonizing sponge, Cozumel Island, Caribbean Sea, Mexico.

Alex Mustard / Banded coral shrimp (Stenopus hispidus) shelters inside Pink vase sponge (Niphates digitalis), on a coral reef. Photographed through the narrow aperture of the sponge. Jardines de la Reina, Gardens of...