(picture not licenced under creative commons) shell : neritoid (the species name indicates this already). the shell of this snail is quite heavy and thick. colour: olive green. operculum: corneous body: dark. eggs: aquatic eggs in gelatineous clutches. habitat: lives in streaming, oxigen rich water (...
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in over their gills through the beating of cilia . suspended food plankton and particles are trapped in the mucus of a gill, and from there are transported to the mouth, where they are eaten, digested, and expelled as feces or pseudofeces. feeding activity is greatest in oysters when the water temperatures...