Search Results for: Snails in shell
in terms of species, but here they occupy only lines, because they are of little interest to scuba divers in the north atlantic, while fish, on the other hand, occupy fully half of the listing. see below for further explanations of the system of taxonomic classification. minerals - nonliving material
class gastropoda - single conical or coiled shell or shell-less -- sub-class prosobranchia - marine snails , slipper shells , limpets - no operculum -- sub-class pulmonata - freshwater & land snails - operculum, lungs -- sub-class opisthobranchia - sea slugs, nudibranchs , sea butterflies class bivalvia...
http://njscuba.net/biology/misc_classification.php