The family Tethyidae is a group of sea sponges belonging to the order Tethyida. These sponges are characterized by their simple, tubular bodies and are typically found in marine environments. Tethyidae species are part of the larger phylum Porifera, which encompasses all sponges. Members of this family play a role in marine ecosystems by filtering water and providing habitats for various marine organisms. While not as widely studied as other marine organisms, Tethyidae contributes to the biodiversity and ecological balance of their habitats.