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Pacific Banana Slug
Ariolimax columbianus
9,804 observations
Pacific Sideband
Monadenia fidelis
4,782 observations
Horned Nudibranch
Hermissenda crassicornis
2,111 observations
Garden Snail
Cornu aspersum
2,007 observations
Leopard Slug
Limax maximus
1,478 observations
Monterey Dorid
Doris montereyensis
1,414 observations
California Mussel
Mytilus californianus
1,307 observations
Striped Dogwinkle
Nucella ostrina
1,252 observations
Robust Lancetooth Snail
Haplotrema vancouverense
1,154 observations
Pleated Juga
Juga plicifera
944 observations
Black Slug
Arion ater
935 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
905 observations
Milky Slug
Deroceras reticulatum
882 observations
Gumboot Chiton
Cryptochiton stelleri
841 observations
Black Leather Chiton
Katharina tunicata
809 observations
Western Pearlshell
Margaritifera falcata
782 observations
Frilled Dogwinkle
Nucella lamellosa
753 observations
Red Sponge Dorid
Rostanga pulchra
750 observations
Three-lined Aeolid
Orienthella trilineata
744 observations
Northern Leopard Dorid
Diaulula odonoghuei
666 observations
Black Tegula
Tegula funebralis
604 observations
Branched Dendronotid
Dendronotus venustus
597 observations
Yellow Cellar Slug
Limacus flavus
594 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
585 observations
Northwest Hesperian
Vespericola columbianus
570 observations
Asian Clam
Corbicula fluminea
543 observations
Pacific Razor Clam
Siliqua patula
503 observations
Oregon forestsnail
Allogona townsendiana
467 observations
Lined Chiton
Tonicella lineata
461 observations
Mossy Chiton
Mopalia muscosa
456 observations
Noble Dorid
Peltodoris nobilis
439 observations
Reticulate Taildropper
Prophysaon andersonii
361 observations
Chocolate Aeolid
Margina cocoachroma
330 observations
Fingered Limpet
Lottia digitalis
307 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
288 observations
Rough Keyhole Limpet
Diodora aspera
281 observations
Purple Olive Snail
Callianax biplicata
265 observations
barnacle-eating dorid
Onchidoris bilamellata
248 observations
Hind's Chiton
Mopalia hindsii
244 observations
Opalescent Inshore Squid
Doryteuthis opalescens
239 observations
White-lined Dirona
Dirona albolineata
236 observations
Invasive
Purple Mahogany Clam
Nuttallia obscurata
234 observations
Nuttall's Cockle
Clinocardium nuttallii
230 observations
Hammerhead Doto
Doto amyra
229 observations
Clown Dorid
Triopha catalinae
209 observations
Fisher's Aeolid
Orienthella piunca
209 observations
Opalescent Nudibranch
Hermissenda opalescens
186 observations
Channeled Basket Snail
Caesia fossata
184 observations
Beaded Lancetooth Snail
Ancotrema sportella
172 observations
San Diego Dorid
Diaulula sandiegensis
172 observations
Frequently Asked Questions
- The 10 most common molluscs in Oregon are:
- Pacific Banana Slug (Ariolimax columbianus)
- Pacific Sideband (Monadenia fidelis)
- Horned Nudibranch (Hermissenda crassicornis)
- Garden Snail (Cornu aspersum)
- Leopard Slug (Limax maximus)
- Monterey Dorid (Doris montereyensis)
- California Mussel (Mytilus californianus)
- Striped Dogwinkle (Nucella ostrina)
- Robust Lancetooth Snail (Haplotrema vancouverense)
- Pleated Juga (Juga plicifera)
- The most observed mollusc in Oregon is Pacific Banana Slug (Ariolimax columbianus), with 9,804 recorded observations.
- Some of the most commonly observed invasive molluscs in Oregon include:
- Purple Mahogany Clam (Nuttallia obscurata)
- Some of the most commonly observed native molluscs in Oregon include:
- Pacific Banana Slug (Ariolimax columbianus)