Iophon laevistylus (Organ-pipe sponge).
Underwater Photography of the Organ-pipe sponge (Iophon laevistylis).
Underwater Photos by New Zealand Photojournalist and Underwater Photographer Richard Robinson.
Phylum: Porifera. Class: Demospongiae. Order: Poecilosclerida. Suborder: Microcionina. Family: Acarnidae.
Habitat: Steeply sloping reef.
Abundance: Rare. 10m to more than 30m.
Distribution: Endemic;