wide spread bivalve mollusc mytilaster filter water for food in black sea saltwater marine biotope aquarium

active adult algae animal aqua aquaculture aquarium aquascape aquatic background biodiversity biotope bivalve black body clear closeup colorful concept covered design environment estuary exotic fauna filter filtrator fish fishkeeping food free funny green instinct introduced invasion invasive invertebrate life lineatus live macro marine mollusc mollusk mussel mytilaster native nature reef salinity saltwater sea shell shells shot space sponges spread stone substrate syphon tank underwater useful valuable water wide widespread wild