WAlvania fractospira is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
WBabelomurex nakayasui is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
WBellaspira acclivicosta is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
WCalliostoma jacquelinae, common name Jacqueline's calliostoma, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
WCalotrophon velero is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
WChelidonura electra is a species of sea slug, a "headshield slug", a marine opisthobranch gastropod mollusk in the family Aglajidae. The species name comes from the daughter of Agamemnon and Greek goddess Electra, meaning "shining", with reference to the brilliance of this slug.
WConasprella memiae, common name Memi's cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
WConasprella spirofilis is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
WConus kintoki is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
WDomiporta gloriola, common name : the glorious mitre, is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.
WDoto wildei is a species of sea slug, a dendronotid nudibranch, a marine gastropod mollusc in the family Dotidae.
WFelimare marci is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae. Placement of this species in Felimare is based on molecular (DNA) evidence.
WFissurella emmanuelae is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.
WIsara pele is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.
WJanolus toyamensis, common name purple-tipped janolus, is a colorful sea slug, an arminina nudibranch, a marine gastropod mollusc in the family Proctonotidae.
WOkenia cupella is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
WPartula langfordi is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Partulidae. This species is known by the common name Langford's tree snail and endemic to the Northern Mariana Islands.
WPhyllidia tula is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.
WPontohedyle verrucosa is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusc in the family Microhedylidae.
WPseudunela cornuta is a species of minute sea slug, an acochlidian, a shell-less marine and temporarily brackish gastropod mollusk in the family Pseudunelidae. Adults are about 3 mm long and live in the spaces between sand grains.
WRanularia boschi is a species of predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.
WTegula picta is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
WTritoniopsis frydis is a species of dendronotid nudibranch, a marine gastropod mollusc in the family Tritoniidae.
WVerconia norba is a species of colorful sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Chromodorididae.