Petrosiidae Collection

Portrait of Blacktip grouper (Epinephelus fasciatus) resting in Barrel sponge (Xestospongia testudinaria) Mabul Island, Sabah, Borneo, Malaysia. Sulawesi Sea

Giant barrel sponge (Xestospongia testudinaria) releases a large cloud of gametes as it spawns on a coral reef, while a Threadfin hawkfish (Cirrhitichthys aprinus) looks

Endemic sponge (Lubomirskia baicalensis) encrusting rocks and branches on the lake floor, Lake Baikal, Siberia, Russia. July

Ribbon sweetlips (Plectorhinchus polytaenia) at Giant barrel sponge (Xestospongia muta) Tulamben, North coast, Bali, Indonesia. Lesser Sunda Islands

Pennant coralfish (Heniochus acuminatus) at Giant barrel sponge (Xestospongia muta) Bali tropical reef community, Tulamben, North coast, Bali, Indonesia. Lesser Sunda Islands

Young Stone sculpin (Paracottus knerii), on endemic sponge (Lubomirskia baicalensis), Lake Baikal, Siberia, Russia

Female Tassled wobbegong shark (Eucrossorhinus dasypogon) rests alongside stand of Barrel sponges (Xestospongia testudinaria) Blue Magic, Raja Ampat, West Papua, Indonesia

Giant barrel sponge (Xestospongia muta) within coral reef. Utila Island, Honduras. Caribbean Sea

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