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Pacific Banana Slug
Ariolimax columbianus
10,411 observations
Pacific Sideband
Monadenia fidelis
4,975 observations
Horned Nudibranch
Hermissenda crassicornis
2,720 observations
Garden Snail
Cornu aspersum
2,109 observations
Monterey Dorid
Doris montereyensis
1,893 observations
Leopard Slug
Limax maximus
1,554 observations
Striped Dogwinkle
Nucella ostrina
1,373 observations
California Mussel
Mytilus californianus
1,358 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
1,329 observations
Robust Lancetooth Snail
Haplotrema vancouverense
1,194 observations
Black Slug
Arion ater
1,017 observations
Pleated Juga
Juga plicifera
997 observations
Black Leather Chiton
Katharina tunicata
927 observations
Gumboot Chiton
Cryptochiton stelleri
927 observations
Milky Slug
Deroceras reticulatum
890 observations
Red Sponge Dorid
Rostanga pulchra
843 observations
Three-lined Aeolid
Orienthella trilineata
820 observations
Western Pearlshell
Margaritifera falcata
792 observations
Frilled Dogwinkle
Nucella lamellosa
783 observations
Branched Dendronotid
Dendronotus venustus
750 observations
Northern Leopard Dorid
Diaulula odonoghuei
717 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
662 observations
Black Tegula
Tegula funebralis
645 observations
Yellow Cellar Slug
Limacus flavus
610 observations
Northwest Hesperian
Vespericola columbianus
600 observations
Asian Clam
Corbicula fluminea
554 observations
Lined Chiton
Tonicella lineata
550 observations
Pacific Razor Clam
Siliqua patula
530 observations
Oregon forestsnail
Allogona townsendiana
493 observations
Mossy Chiton
Mopalia muscosa
477 observations
Noble Dorid
Peltodoris nobilis
468 observations
White-lined Dirona
Dirona albolineata
433 observations
Reticulate Taildropper
Prophysaon andersonii
367 observations
Chocolate Aeolid
Margina cocoachroma
356 observations
Hammerhead Doto
Doto amyra
344 observations
Opalescent Inshore Squid
Doryteuthis opalescens
328 observations
Fingered Limpet
Lottia digitalis
316 observations
Rough Keyhole Limpet
Diodora aspera
299 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
291 observations
Fisher's Aeolid
Orienthella piunca
283 observations
Purple Olive Snail
Callianax biplicata
281 observations
Hind's Chiton
Mopalia hindsii
280 observations
White Dendronotus
Dendronotus albus
270 observations
barnacle-eating dorid
Onchidoris bilamellata
253 observations
Nuttall's Cockle
Clinocardium nuttallii
241 observations
Invasive
Purple Mahogany Clam
Nuttallia obscurata
240 observations
Opalescent Nudibranch
Hermissenda opalescens
232 observations
Clown Dorid
Triopha catalinae
221 observations
Stubby Dendronotid
Dendronotus subramosus
221 observations
Channeled Basket Snail
Caesia fossata
202 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)
- Monterey Dorid (Doris montereyensis)
- Leopard Slug (Limax maximus)
- Striped Dogwinkle (Nucella ostrina)
- California Mussel (Mytilus californianus)
- White-and-orange-tipped Nudibranch (Antiopella fusca)
- Robust Lancetooth Snail (Haplotrema vancouverense)
- The most observed mollusc in Oregon is Pacific Banana Slug (Ariolimax columbianus), with 10,411 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)