 "Lubomirskia baicalensis", "Baikalospongia bacillifera", and "B. intermedia" are unusually large for freshwater sponges and can reach or more.These three are also the most common sponges in the lake.While the "Baikalospongia" species typically have encrusting or carpet-like structures, "L. baikalensis" often has branching structures and in areas where common may form underwater "forests".