Calispongia

Calispongia is a genus of sea sponges in the phylum Porifera. The genus includes multiple described species and is known from marine environments in various regions.

Like other sponges, Calispongia species are stationary, filter-feeding organisms. They lack true tissues and organs, and their body plan relies on choanocyte chambers within a skeletal framework that can involve silica-based spicules and/or spongin fibers, with composition varying by species. This simple organization enables efficient water filtration and nutrient uptake from the surrounding seawater.

Habitat and ecology: Calispongia species inhabit a range of marine environments, from shallow coastal areas to deeper rocky substrates, depending on the species. As filter feeders, they contribute to water clarity and nutrient cycling and can provide microhabitat for other small organisms.

Taxonomy and research: The precise placement of Calispongia within sponge phylogeny has evolved with advances in morphological and molecular studies. Research on the genus focuses on clarifying species boundaries, understanding skeletal and cellular characteristics, and elucidating biogeographic patterns. As with many sponge groups, taxonomy remains an active area of inquiry, with new species occasionally described and revisions to classifications published.