Marine slugs and marine snails {nudibranch}| have no shells.
Sea snails {cone snail} can make peptide toxin {cone snail venom} {conantokin} that paralyzes fish or molluscs by affecting calcium-ion channels. Cone snails shoot out one tube with poison at end. 500 species have 50,000 different peptides.
Marine gastropods can have no shells {sea slug} {marine slug}.
Marine gastropods {pteropod} {sea snail, mollusc} {marine snail} are small.
Land nudibranchs {slug, mollusc} have no shells.
Nudibranchs {snail, mollusc} can live on land or in water. Land nudibranchs have shells.
4-Zoology-Kinds-Mollusc-Gastropod
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Date Modified: 2022.0225