Spongia

Spongia is a genus of marine sponges belonging to the family Spongiidae. These sponges are characterized by their soft, compressible bodies and their ability to absorb and retain large amounts of water. Historically, members of this genus, along with other related sponges, have been harvested and processed for use as bath sponges and other cleaning implements.

The skeletal structure of Spongia species is composed of spongin fibers, a tough, flexible protein. This fibrous network provides support and structure to the sponge, allowing it to maintain its shape even when saturated with water. The spongin skeleton distinguishes them from sponges with mineral spicules.

Spongia sponges are found in warm, shallow waters of the Mediterranean Sea, the Caribbean Sea, and other tropical and subtropical regions. They typically attach themselves to rocky substrates or other submerged surfaces.

The commercial importance of Spongia sponges has led to concerns about overharvesting and the sustainability of sponge populations. Efforts are underway in some regions to promote sustainable harvesting practices and to cultivate sponges for commercial use.