marine invasive species veined whelk (rapana venosa

ballast water benthos bentos black sea cochlea cocoons conch disbalance ecocatastrophe ecological ecology environment exotic fauna gastropod gastropoda invader invasia invasion invasive species invertebrate marine invasions mollusc mollusca mollusk organisms predatory rapana venosa whelk seashell shell shellfish shipping snail solid spiral stones thomasiana undersea veined wild wildlife