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Pacific Banana Slug
Ariolimax columbianus
11,514 observations
Pacific Sideband
Monadenia fidelis
5,214 observations
Horned Nudibranch
Hermissenda crassicornis
2,986 observations
Garden Snail
Cornu aspersum
2,323 observations
Monterey Dorid
Doris montereyensis
2,080 observations
California Mussel
Mytilus californianus
2,001 observations
Leopard Slug
Limax maximus
1,761 observations
Striped Dogwinkle
Nucella ostrina
1,553 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
1,531 observations
Robust Lancetooth Snail
Haplotrema vancouverense
1,291 observations
Black Slug
Arion ater
1,267 observations
Pleated Juga
Juga plicifera
1,106 observations
Black Leather Chiton
Katharina tunicata
983 observations
Gumboot Chiton
Cryptochiton stelleri
977 observations
Milky Slug
Deroceras reticulatum
964 observations
Red Sponge Dorid
Rostanga pulchra
891 observations
Branched Dendronotid
Dendronotus venustus
855 observations
Yellow Cellar Slug
Limacus flavus
841 observations
Frilled Dogwinkle
Nucella lamellosa
834 observations
Three-lined Aeolid
Orienthella trilineata
828 observations
Western Pearlshell
Margaritifera falcata
827 observations
Northwest Hesperian
Vespericola columbianus
806 observations
Northern Leopard Dorid
Diaulula odonoghuei
793 observations
Black Tegula
Tegula funebralis
762 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
760 observations
Lined Chiton
Tonicella lineata
585 observations
Asian Clam
Corbicula fluminea
585 observations
Pacific Razor Clam
Siliqua patula
566 observations
White-lined Dirona
Dirona albolineata
542 observations
Oregon forestsnail
Allogona townsendiana
523 observations
Mossy Chiton
Mopalia muscosa
500 observations
Noble Dorid
Peltodoris nobilis
495 observations
Reticulate Taildropper
Prophysaon andersonii
408 observations
Fingered Limpet
Lottia digitalis
376 observations
Hammerhead Doto
Doto amyra
367 observations
Chocolate Aeolid
Margina cocoachroma
365 observations
Opalescent Inshore Squid
Doryteuthis opalescens
335 observations
Rough Keyhole Limpet
Diodora aspera
324 observations
Hind's Chiton
Mopalia hindsii
323 observations
Fisher's Aeolid
Orienthella piunca
312 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
303 observations
Purple Olive Snail
Callianax biplicata
300 observations
Nuttall's Cockle
Clinocardium nuttallii
284 observations
White Dendronotus
Dendronotus albus
283 observations
Clown Dorid
Triopha catalinae
278 observations
Opalescent Nudibranch
Hermissenda opalescens
276 observations
Invasive
Purple Mahogany Clam
Nuttallia obscurata
273 observations
barnacle-eating dorid
Onchidoris bilamellata
257 observations
San Diego Dorid
Diaulula sandiegensis
238 observations
Stubby Dendronotid
Dendronotus subramosus
234 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)
- California Mussel (Mytilus californianus)
- Leopard Slug (Limax maximus)
- Striped Dogwinkle (Nucella ostrina)
- 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 11,514 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)