This biocenosis often occupies vast areas along low coasts and in the bottoms of wide bays at depths 2 - 25 metres.The characteristic species are pelecypod molluscs (e.g. Donax venustus, Tellina pulchella, Tellina planata, Cardium tuberculatum), gastropods (e.g. Nassa mutabilis and Neverita josephina), crustaceans (e.g. Crangon crangon and Iphinoe josephina) and small fish (e.g. Gobius microps, Callionymus belenus, Solea solea and Trachinus draco).