Like all marine sponges, C. truncata is a member of phylum Porifera and is defined by its filter-feeding lifestyle and flagellated choanocytes, or collar cells, that allow for water movement and feeding.

[1] It is a species of demosponge and a member of Demospongiae, the largest class of sponges[2] as well as the family Callyspongiidae.

It was first isolated in 1997 from this organism, which was collected from the Goto Islands in the Nagasaki Prefecture of Japan by the Kobayashi group.

The inside of the sponge consists of internal water canals leading to one central cavity.

Members of the genus Callyspongia are found primarily in tropical environments, notably the Central and Western Pacific.

C. truncata is known to inhabit the Western Central Pacific Ocean, and it has also been found around Vietnam and Japan.

Like all sponges, they are sessile organisms, meaning that they are incapable of locomotion and remain attached to the substrate they settle on.

[11] They are benthic, or bottom dwelling, and are generally found living attached to rocks or other substrates.

[10] The larva settles onto a hard substrate and begins to undergo metamorphosis, or the process of growing into an adult sponge.

The internal water canal system is formed, followed by the outer pore and the osculum, which signifies the final stage of metamorphosis.