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Pacific Banana Slug
Ariolimax columbianus
10,907 observations
Pacific Sideband
Monadenia fidelis
5,104 observations
Horned Nudibranch
Hermissenda crassicornis
2,871 observations
Garden Snail
Cornu aspersum
2,208 observations
Monterey Dorid
Doris montereyensis
2,053 observations
Leopard Slug
Limax maximus
1,650 observations
Striped Dogwinkle
Nucella ostrina
1,513 observations
White-and-orange-tipped Nudibranch
Antiopella fusca
1,484 observations
California Mussel
Mytilus californianus
1,424 observations
Black Slug
Arion ater
1,262 observations
Robust Lancetooth Snail
Haplotrema vancouverense
1,233 observations
Pleated Juga
Juga plicifera
1,048 observations
Black Leather Chiton
Katharina tunicata
976 observations
Gumboot Chiton
Cryptochiton stelleri
966 observations
Milky Slug
Deroceras reticulatum
913 observations
Red Sponge Dorid
Rostanga pulchra
883 observations
Three-lined Aeolid
Orienthella trilineata
822 observations
Frilled Dogwinkle
Nucella lamellosa
815 observations
Branched Dendronotid
Dendronotus venustus
815 observations
Western Pearlshell
Margaritifera falcata
811 observations
Yellow Cellar Slug
Limacus flavus
796 observations
Nanaimo Dorid
Acanthodoris nanaimoensis
734 observations
Northern Leopard Dorid
Diaulula odonoghuei
729 observations
Black Tegula
Tegula funebralis
685 observations
Northwest Hesperian
Vespericola columbianus
628 observations
Lined Chiton
Tonicella lineata
576 observations
Asian Clam
Corbicula fluminea
562 observations
Pacific Razor Clam
Siliqua patula
546 observations
White-lined Dirona
Dirona albolineata
526 observations
Oregon forestsnail
Allogona townsendiana
515 observations
Mossy Chiton
Mopalia muscosa
491 observations
Noble Dorid
Peltodoris nobilis
487 observations
Reticulate Taildropper
Prophysaon andersonii
390 observations
Hammerhead Doto
Doto amyra
365 observations
Chocolate Aeolid
Margina cocoachroma
365 observations
Fingered Limpet
Lottia digitalis
347 observations
Opalescent Inshore Squid
Doryteuthis opalescens
335 observations
Rough Keyhole Limpet
Diodora aspera
317 observations
Hind's Chiton
Mopalia hindsii
311 observations
Fisher's Aeolid
Orienthella piunca
300 observations
Purple Olive Snail
Callianax biplicata
296 observations
Yellow-bordered Taildropper
Prophysaon foliolatum
295 observations
White Dendronotus
Dendronotus albus
283 observations
Nuttall's Cockle
Clinocardium nuttallii
281 observations
Clown Dorid
Triopha catalinae
265 observations
barnacle-eating dorid
Onchidoris bilamellata
257 observations
Opalescent Nudibranch
Hermissenda opalescens
253 observations
Invasive
Purple Mahogany Clam
Nuttallia obscurata
245 observations
Stubby Dendronotid
Dendronotus subramosus
233 observations
Channeled Basket Snail
Caesia fossata
220 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)
- White-and-orange-tipped Nudibranch (Antiopella fusca)
- California Mussel (Mytilus californianus)
- Black Slug (Arion ater)
- The most observed mollusc in Oregon is Pacific Banana Slug (Ariolimax columbianus), with 10,907 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)