Alex Mustard / Portrait of a Giant frogfish (Antennarius commersoni) on a large Yellow elephant ear sponge (Ianthella basta). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Juergen Freund / Elephant ear sponge (Ianthella basta) with a Triplefin blenny resting on it, West New Britain, Papua New Guinea.

Norbert Wu / Elephant Ear Sponge (Ianthella basta) with schools of Black-tipped Fusiliers (Pterocaesio digramma) swimming behind, Solomon Islands

Chris Newbert / Elephant Ear Sponge (Ianthella basta) and schooling Barracuda (Sphyraena genie) in background, 110 feet deep, Solomon Islands

Alex Mustard / Portrait of a Giant frogfish (Antennarius commersoni) on a large Yellow elephant ear sponge (Ianthella basta) on a coral reef. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Franco Banfi / Elephant ear sponge (Ianthella basta) with a scuba diver swimming in he background, Gorgonia Wall Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Tony Wu / Yellow elephant ear sponge (Ianthella basta) with unique lighting to make it resemble a sculpture, Hornbill Channel in Milne Bay, Papua New Guinea.

Juergen Freund / Elephant ear sponge (Ianthella basta) covered in Featherstars / crinoids, West New Britain, Papua New Guinea.

Juergen Freund / Elephant ear sponge (Ianthella basta) Kimbe Bay, West New Britain, Papua New Guinea.

Juergen Freund / Elephant ear sponge (Ianthella basta) in the reef. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Elephant ear sponge (Ianthella basta) in the reef with a diver swimming behind. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Elephant ear sponge (Ianthella basta) in the reef with a shoal of fish swimming behind. Misool, Raja Ampat, West Papua, Indonesia.