A living guide to Kauaʻi
Shells, Snails & Other Mollusks of Kauaʻi
Explore the island’s native and introduced species, habitats, watersheds and conservation work. Each record connects its description, images and sources with the interactive Atlas.
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Succinea lumbalis
Succinea lumbalis
Bishop Museum terrestrial mollusk checklist explicitly places Succinea lumbalis on Kauaʻi. Fresh WoRMS/MolluscaBase query returned Succinea lumbalis accepted (AphiaID 1464552). Terrestrial snail. Institutional Kauaʻi checklist plus accep
Synaptocochlea concinna
Synaptocochlea concinna
TR29a appendix records Synaptocochlea concinna at a Kauaʻi station. Fresh WoRMS/MolluscaBase query returned Synaptocochlea concinna accepted (AphiaID 594170). TR29a sampled shallow harbor and coral-reef stations by underwater search, gene
Tambja morosa
Tambja morosa
TR29a records Tambja morosa at a Kauaʻi station; Sea Slugs of Hawaiʻi independently lists Kauaʻi in its distribution. Fresh WoRMS/MolluscaBase query returned Tambja morosa accepted (AphiaID 531173). Expert account documents rocky reef hab
Tarebia granifera
Tarebia granifera
Hawaiʻi Division of Aquatic Resources watershed-atlas reports for Kīlauea and Wailua River, Kauaʻi, list Tarebia granifera with measured sizes, densities, and reach presence. Fresh WoRMS/MolluscaBase query returned Tarebia granifera accept
Tayloria quadrilateralis
Tayloria quadrilateralis
Bishop Museum Occasional Paper 50 catalogs the taxon as introduced on Kauai. MolluscaBase AphiaID 1326770 and GBIF treat Gonaxis quadrilateralis as a superseded combination/synonym of Tayloria quadrilateralis. Final normalization uses the
Tayuva lilacina
Tayuva lilacina
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi under the source combination Discodoris lilacina; a 2026 Kauaʻi community observation corroborates. Fresh WoRMS/MolluscaBase query returned Tayuva lilacina accepted (AphiaID 578710); expert acco
Tenellia nakapila
Tenellia nakapila
Sea Slugs of Hawaiʻi explicitly includes Kauaʻi; two 2023 community observations corroborate the expert account. Fresh WoRMS/MolluscaBase query returned Tenellia nakapila accepted (AphiaID 1783802). Expert account reports rocky areas at 1
Tenellia pinnifera
Tenellia pinnifera
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi in distribution, but supplies no dated Kauaʻi specimen on the main page. Fresh WoRMS/MolluscaBase query returned Tenellia pinnifera accepted (AphiaID 1898001); expert account notes Cuthona/Catri
Thecacera pacifica
Thecacera pacifica
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; a 2023 community observation corroborates. Fresh WoRMS/MolluscaBase query returned Thecacera pacifica accepted (AphiaID 420618). Expert account reports sand/debris/Halimeda at 8-18 m and rocky
Thecodonta symmetrica
Thecodonta symmetrica
TR29a appendix records source-name Kona symmetrica at a Kauaʻi station. Fresh WoRMS/MolluscaBase query returned Thecodonta symmetrica accepted (AphiaID 595507), bridging the older Kona combination. TR29a sampled shallow Kauaʻi harbor and
Thorunna daniellae
Thorunna daniellae
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; a 2023 community observation corroborates. Fresh WoRMS/MolluscaBase query returned Thorunna daniellae accepted (AphiaID 558680); expert account records historical Hypselodoris usage. Expert ac
Thorunna kahuna
Thorunna kahuna
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; 2021 and 2024 community observations corroborate. Fresh WoRMS/MolluscaBase query returned Thorunna kahuna accepted (AphiaID 457656). Expert account reports rocky habitat at 3-27 m. Authoritat
Thuridilla carlsoni
Thuridilla carlsoni
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; 2012 and 2025 community records corroborate. Fresh WoRMS/MolluscaBase query returned Thuridilla carlsoni accepted (AphiaID 494490). Expert account reports shallow rocky bottoms, usually 1-3 m
Thuridilla multimarginata
Thuridilla multimarginata
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; paired 2023 community observations corroborate. Fresh WoRMS/MolluscaBase query returned Thuridilla multimarginata accepted (AphiaID 494501). Expert account reports reef flats below 1 m and rub
Thuridilla neona
Thuridilla neona
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; two 2020 community observations corroborate. Fresh WoRMS/MolluscaBase query returned Thuridilla neona accepted (AphiaID 494502). Expert account documents rocky bottoms mostly <1-3 m, rarely to
Thylacodes variabilis
Thylacodes variabilis
TR29a and NOAA HCRI both record source-name Serpulorbis variabilis from Kauaʻi; 2010 and 2026 community observations corroborate. Fresh WoRMS/MolluscaBase query returned Thylacodes variabilis accepted (AphiaID 709511), bridging Serpulorbis
Tornatellaria newcombi
Tornatellaria newcombi
Bishop Museum checklist verifies historical Kauaʻi occurrence; a 2022 alive-annotated Kauaʻi community observation corroborates survival. Fresh WoRMS/MolluscaBase query returned Tornatellaria newcombi accepted (AphiaID 1380942). Terrestri
Tornatellides drepanophorus
Tornatellides drepanophorus
Bishop Museum terrestrial checklist explicitly records Tornatellides drepanophorus from Kauaʻi. Fresh WoRMS/MolluscaBase query returned Tornatellides drepanophorus accepted (AphiaID 1487092). Terrestrial land snail. Institutional island
Tornatellides macromphala
Tornatellides macromphala
Bishop Museum checklist records Tornatellides macromphala subsp. macromphala from Kauaʻi. Fresh WoRMS/MolluscaBase query returned Tornatellides macromphala accepted (AphiaID 1486654). Terrestrial land snail. Institutional Kauaʻi record a
Tornatellides perkinsi
Tornatellides perkinsi
Bishop Museum checklist records Tornatellides perkinsi subsp. perkinsi from Kauaʻi. Fresh WoRMS/MolluscaBase query returned Tornatellides perkinsi accepted (AphiaID 1486472). Terrestrial land snail. Institutional island occurrence and ac
Tornatellides procerulus
Tornatellides procerulus
Bishop Museum checklist records Tornatellides procerulus subsp. procerulus from Kauaʻi. Fresh WoRMS/MolluscaBase query returned Tornatellides procerulus accepted (AphiaID 1457443). Terrestrial land snail. Institutional Kauaʻi locality an
Tornatellides productus
Tornatellides productus
Bishop Museum checklist explicitly records Tornatellides productus from Kauaʻi. Fresh WoRMS/MolluscaBase query returned Tornatellides productus accepted (AphiaID 1487119). Terrestrial land snail. Institutional island record plus accepted
Trapania euryeia
Trapania euryeia
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi, but the main page provides no dated Kauaʻi specimen. Fresh WoRMS/MolluscaBase query returned Trapania euryeia accepted (AphiaID 457509). Expert account reports rocky habitats at <1-8 m. Exper
Trichamathina bicarinata
Trichamathina bicarinata
TR29a appendix records source-name Amathina bicarinatus at a Kauaʻi station. Fresh WoRMS/MolluscaBase query returned Trichamathina bicarinata accepted (AphiaID 1732952), bridging the older Amathina combination. TR29a sampled shallow harbo
Tryonia porrecta
Tryonia porrecta
Peer-reviewed Sedimentology study identifies Tryonia porrecta shells in multiple Anahola Valley, Kauaʻi cores and Makauwahi Sinkhole deposits. Fresh WoRMS/MolluscaBase query returned Tryonia porrecta accepted (AphiaID 886630). Study ident
Tubulophilinopsis pilsbryi
Tubulophilinopsis pilsbryi
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; 2022 and 2024 community observations corroborate. Fresh WoRMS/MolluscaBase query returned Tubulophilinopsis pilsbryi accepted (AphiaID 1055261); expert account documents Philinopsis/Aglaja hist
Vayssierea felis
Vayssierea felis
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi in distribution, without a dated Kauaʻi specimen on the main page. Fresh WoRMS/MolluscaBase query returned Vayssierea felis accepted (AphiaID 597200); expert account documents Okadaia elegans hi
Vellicolla muscaria
Vellicolla muscaria
Sea Slugs of Hawaiʻi lists Kauaʻi under the source spelling Vellicolla muscarius. Fresh WoRMS/MolluscaBase query returned Vellicolla muscaria accepted (AphiaID 1342098); the expert page uses the gender variant muscarius. Expert account re
Verconia simplex
Verconia simplex
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi but supplies no dated Kauaʻi specimen on the main page. Fresh WoRMS/MolluscaBase query returned Verconia simplex accepted (AphiaID 866663); expert account notes Hypselodoris peasei/Noumea simple
Verconia varians
Verconia varians
Sea Slugs of Hawaiʻi explicitly lists Kauaʻi; a 2020 community observation corroborates. Fresh WoRMS/MolluscaBase query returned Verconia varians accepted (AphiaID 866667); expert account notes Thorunna/Noumea historical usage. Expert acc
Vexillum tusum
Vexillum tusum
TR29a appendix (PDF p.115/printed p.107) records Vexillum tusum at Kauaʻi station Ka4 (Port Allen reef). Fresh WoRMS/MolluscaBase query returned Vexillum tusum accepted (AphiaID 758960). Ka4 was a shallow coral-reef station surveyed under
Vexillum unifasciale
Vexillum unifasciale
TR29a appendix (PDF p.115/printed p.107) records source spelling Vexillum unifascialis at Kauaʻi station Ka4. Fresh WoRMS/MolluscaBase query returned Vexillum unifasciale accepted (AphiaID 751923); source spelling is normalized for gender.
Viriola incisa
Viriola incisa
TR29a appendix (PDF p.112/printed p.104) records Viriola incisa at Kauaʻi station Ka2. Fresh WoRMS/MolluscaBase query returned Viriola incisa accepted (AphiaID 216732). Ka2 is Nawiliwili Harbor; TR29a used shallow underwater searches and
Viriolopsis fallax
Viriolopsis fallax
TR29a appendix (PDF p.112/printed p.104) records source-name Viriola fallax at Kauaʻi station Ka4. Fresh WoRMS/MolluscaBase query returned Viriolopsis fallax accepted (AphiaID 591898), bridging Viriola fallax. Ka4 is Port Allen shallow co
Vitrina tenella
Vitrina tenella
Bishop Museum terrestrial mollusk checklist explicitly assigns Vitrina tenella to Kauaʻi. Fresh WoRMS/MolluscaBase query returned Vitrina tenella accepted (AphiaID 1375730). Terrestrial land snail; marine habitat filter does not apply. I
Williamia radiata
Williamia radiata
TR29a appendix (PDF p.124/printed p.116) records Williamia radiata at Kauaʻi stations Ka2, Ka3, and Ka4. Fresh WoRMS/MolluscaBase query returned Williamia radiata accepted (AphiaID 559198). The stations are Nawiliwili Harbor and Poʻipū/Po
Zebina tridentata
Zebina tridentata
TR29a appendix (PDF p.109/printed p.101) records Zebina tridentata at Kauaʻi station Ka4. Fresh WoRMS/MolluscaBase query returned Zebina tridentata accepted (AphiaID 216962). Ka4 is Port Allen shallow coral reef, surveyed underwater in Oc
Red-rimmed Melania
Melanoides tuberculata
Bishop Museum catalogue lists the species on Kauai (K) as established; six inspected 2008 Kauai watershed sheets record it as introduced and present.
Obelisk Creeper
Rhinoclavis sinensis
The NOAA-hosted HCRI Final Report records Rhinoclavis sinensis in the Kauai reef-survey row; 2002 Kauaʻi observations corroborate.
Cerithium zebrum
Cerithium zebrum
A small horn snail with straight-sided whorls and a short aperture. A verified Port Allen survey mark and a dated Poʻipū shell photograph support qualified Kauaʻi occurrence.
Ittibittium parcum
Ittibittium parcum
Bishop Museum TR29 records Ittibittium parcum at Kauai stations; a 2018 Poipu record is annotated alive.
Carinapex minutissima
Carinapex minutissima
A tiny Indo-Pacific marine snail documented by examined Kauaʻi specimens in a 2015 revision. Its original identity is retained, with older name-based survey records qualified against later species distinctions.
Livid Cone
Conus lividus
Bishop Museum TR29 records Kauaʻi occurrence; HCRI records Conus lividus at Kauaʻi KARA3, KARA5, and KARA6; iNaturalist adds Princeville (2007) and Salt Pond (2017) records.
Mile Cone
Conus miles
Bishop Museum TR29 records Kauaʻi coastal-station occurrence; iNaturalist RG observations 137365047 (Waimea, 2022) and 337489089 (Poʻipū, 2025) have explicit island coordinates.
Abbreviated Cone
Conus abbreviatus
The Abbreviated Cone is a Hawaiian endemic with a low coronated spire and rows of brown shell spots. Kauaʻi evidence includes local photographic observations and preserved specimens. These records do not establish present living abundance.
Morelet's Cone
Conus moreleti
HCRI records Conus moreleti at Kauaʻi station KARA6; iNaturalist records include 283321615 (Kōloa Landing, 2025-05-21) and 35142647 (Lawai, 1999).
Oak Cone
Conus quercinus
Bishop Museum TR29 coastal survey records Conus quercinus in Kauaʻi station columns; iNaturalist observation 6862264 documents a 2017 shell near Waimea River mouth.
Rat Cone
Conus rattus
Bishop Museum TR29 records a Kauaʻi coastal-station occurrence; iNaturalist RG observations 320988248 (Poʻipū, 2025-10-14) and 35142500 (Lawai, observed 2003) have explicit island coordinates.
Dotted Periwinkle
Littoraria pintado
Bishop Museum Technical Report 29 visually confirms the species at one or more Kauai stations (Ka1-Ka4) in its present-study table.
Giant African Land Snail
Lissachatina fulica
Bishop Museum catalogue uses island code K for Kauai; multiple research-grade, alive-annotated Kauai observations corroborate persistence.
Neritona granosa
Neritona granosa
Explicit Kauai locality is independently supported: the 2008 Wainiha sheet and numerous other 2008 Kauai watershed sheets list Neritina granosa; the 2021 review confirms the modern accepted combination and native Hawaiian ecology. Mollusca
Neripteron vespertinum
Neripteron vespertinum
Explicit Kauai locality is independently supported: the 2008 Wainiha watershed sheet and additional 2008 Kauai watershed sheets list Neritina vespertina; the 2021 review confirms the modern accepted combination and native Hawaiian ecology.
Newcomb's Snail
Erinna newcombi
A tiny Kauaʻi endemic freshwater snail with a smooth black, nearly limpet-like shell and strongly reduced spire. Federal reviews document dated spring-fed stream observations, while recent population condition remains unresolved.
Carelia anceophila
Carelia anceophila
A historically documented Kauaʻi land snail in Amastridae, described from two dead shells collected along the Olokele trail. The plate reconstructs the adult type shell; living soft parts are undocumented. Listed as extinct in Bishop Museum
Carelia bicolor
Carelia bicolor
Historical Kauaʻi land snail in Amastridae, documented from northern coastal valleys and trails. The plate reconstructs the adult Hanakapiai shell in Cooke 1931 plate IV figure 2. Listed extinct in Bishop Museum’s dated 1997 assessment, wit
Carelia cochlea
Carelia cochlea
A Kauaʻi land snail documented from historical fossil-shell collections on northern coastal flats. The selected Kalihikai adult in Cooke’s plate VIII figure 12 has nine spiral ridges. Fossil recovery dates do not establish living occurrence
Carelia cumingiana
Carelia cumingiana
Historical Kauaʻi land snail in Amastridae. The plate reconstructs the complete typical-form adult shell in Cooke 1931 plate VI figure 2. Older Kauai and Koolau labels are retained; Lumahai is a proposed historical locality, not an exact sp
Carelia dolei
Carelia dolei
Kauaʻi endemic land snail in Amastridae, known from historical dead and fossil shells. The adult type has a narrow, tall shell; its broad Hanalei label does not establish an exact type station.
Carelia evelynae
Carelia evelynae
Kauaʻi endemic land snail in Amastridae, described from fossil deposits at Polihale and Kaaweiki. Its compact adult shell has seven whorls and a thickened lip; collection dates do not date the fossils.
Carelia glossema
Carelia glossema
Kauaʻi endemic land snail in Amastridae, historically collected alive in Olokele. Its narrow dark adult shell bears coarse vertical sculpture and tuberculate upper whorls; Makaweli is fragmentary dead-shell evidence.
