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Pacific Banana Slug
Ariolimax columbianus
9,233 observations
Pacific Sideband
Monadenia fidelis
4,457 observations
Horned Nudibranch
Hermissenda crassicornis
1,874 observations
Garden Snail
Cornu aspersum
1,838 observations
Leopard Slug
Limax maximus
1,414 observations
California Mussel
Mytilus californianus
1,284 observations
Monterey Dorid
Doris montereyensis
1,235 observations
Striped Dogwinkle
Nucella ostrina
1,180 observations
Robust Lancetooth Snail
Haplotrema vancouverense
1,103 observations
Pleated Juga
Juga plicifera
890 observations
Black Slug
Arion ater
883 observations
Milky Slug
Deroceras reticulatum
872 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
846 observations
Gumboot Chiton
Cryptochiton stelleri
804 observations
Western Pearlshell
Margaritifera falcata
765 observations
Black Leather Chiton
Katharina tunicata
753 observations
Frilled Dogwinkle
Nucella lamellosa
736 observations
Red Sponge Dorid
Rostanga pulchra
676 observations
Three-lined Aeolid
Orienthella trilineata
674 observations
Northern Leopard Dorid
Diaulula odonoghuei
651 observations
Yellow Cellar Slug
Limacus flavus
578 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
571 observations
Black Tegula
Tegula funebralis
567 observations
Asian Clam
Corbicula fluminea
537 observations
Northwest Hesperian
Vespericola columbianus
502 observations
Pacific Razor Clam
Siliqua patula
491 observations
Mossy Chiton
Mopalia muscosa
445 observations
Noble Dorid
Peltodoris nobilis
433 observations
Oregon forestsnail
Allogona townsendiana
430 observations
Branched Dendronotid
Dendronotus venustus
420 observations
Lined Chiton
Tonicella lineata
416 observations
Reticulate Taildropper
Prophysaon andersonii
352 observations
Fingered Limpet
Lottia digitalis
305 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
285 observations
Rough Keyhole Limpet
Diodora aspera
269 observations
Purple Olive Snail
Callianax biplicata
251 observations
barnacle-eating dorid
Onchidoris bilamellata
245 observations
Chocolate Aeolid
Margina cocoachroma
245 observations
Invasive
Purple Mahogany Clam
Nuttallia obscurata
230 observations
Nuttall's Cockle
Clinocardium nuttallii
229 observations
Hind's Chiton
Mopalia hindsii
228 observations
White-lined Dirona
Dirona albolineata
220 observations
Opalescent Inshore Squid
Doryteuthis opalescens
220 observations
Clown Dorid
Triopha catalinae
207 observations
Hammerhead Doto
Doto amyra
177 observations
Channeled Basket Snail
Caesia fossata
174 observations
San Diego Dorid
Diaulula sandiegensis
169 observations
Beaded Lancetooth Snail
Ancotrema sportella
155 observations
Channeled Dog Winkle
Nucella canaliculata
148 observations
Northern Bay Mussel
Mytilus trossulus
138 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)
- California Mussel (Mytilus californianus)
- Monterey Dorid (Doris montereyensis)
- 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 9,233 recorded observations.
- Some of the most commonly observed invasive molluscs in Oregon include:
- Purple Mahogany Clam (Nuttallia obscurata)