Home > Northwest Shells & Marine Life > PNW Shells & Marine Life Photos > Aplacophora, Cephalopods and Scaphopods

Doryteuthis opalescens Doryteuthis opalescens Doryteuthis opalescens
 Freshwater Bay, WA, subtidal                 Penrose Point State Park, WA, intertidal and shallow subtidal  
          a dying squid                                  probably Doryteuthis eggs, laid in shallow water at high tide

Enteroctopus dofleini Enteroctopus dofleini
 Low Point, WA, subtidal                            Anacortes, WA, very low intertidal, octopus den
Enteroctopus dofleini (Wülker, 1910)
Giant Pacific Octopus
intertidal to 1500m          north Mexico to north Alaska; Japan; Siberia          size to 7.3m
This is the world's largest octopus species.  It is rare to see the animal intertidally, but on a good low tide, one can sometimes find its dens.
 (previous name - Octopus dofleini)


Rossia pacifica Rossia pacifica
                       Freshwater Bay, WA, subtidal                                         West Seattle, WA, subtidal
Rossia pacifica S.S. Berry, 1911
Stubby Squid
subtidal to 600m         north Mexico to north Alaska; Korea; Japan to Siberia           size to 15cm
This small species can change color instantaneously and shoots a blob of ink as it shoots away from divers.
(synonym - Rossia borealis)

Fissidentalium erosum
Fissidentalium erosum
Shimek & Moreno, 1996
found below 3000m, eastern Pacific
Fissidentalium actiniophorum
Fissidentalium actiniophorum
Shimek, 1997
found below 3000m, eastern Pacific

Fissidentalium megathyris
Fissidentalium megathyris (Dall, 1890)
Costate Tuskshell
found below 1000m, eastern Pacific

Doryteuthis opalescens
Vashon Island, WA, subtidal 
a "squid pen" which is a residual shell inside the
squid's mantle.

Doryteuthis opalescens (Berry, 1911)
Opalescent Squid or California Market Squid
pelagic          size to 28cm
north Mexico to south Alaska
The eggs of this species are occasionally seen in the low intertidal.  Subtidally they can be found in very large masses.  The squid live less than a year.
(previous name - Loligo opalescens)

Rhabdus rectius Rhabdus rectius Rhabdus rectius
Rhabdus rectius (Carpenter, 1865)
Western Straight Tuskshell
Peru to Alaska

Octopus rubescens Octopus rubescens Octopus rubescens
all Freshwater Bay, WA, subtidal
Octopus rubescens
Berry, 1953

Pacific Red Octopus
intertidal to 300m          north Mexico to central Alaska          size to 50cm
This species is very rarely seen intertidally.  It can be differentiated from a young Giant Pacific Octopus by the three "eyelashes" below each eye.

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This page last revised: 2-27-2016
Pulsellum salishorum Pulsellum salishorum
Pulsellum salishorum Marshall, 1980
Salish Toothshell
eastern Pacific
Gadila aberrans Gadila aberrans
Gadila aberrans (Whiteaves, 1887)
Aberrant Toothshell
south California to Alaska
Cadulus tolmiei
Cadulus tolmiei Dall, 1897
south California to south BC
Cadulus californicus
Cadulus californicus
Pilsbry & Sharp, 1898
Californian Cadulus
south California to south BC

Citation:  Pacific Northwest Shell Club, www.PNWSC.org
Antalis pretiosa Antalis pretiosa
Antalis pretiosa (Sowerby, 1860)
Indian Money Tusk
north Mexico to south Alaska
Chaetoderma argenteum
Chaetoderma cf argenteum Loven, 1844
California to Alaska

Aplacophora, Cephalopods and Scaphopods

(Oregon to Southeast Alaska)

Click on thumbnails to enlarge.  Scale line in photo equals 1cm unless otherwise specified.

These species are all subtidal and generally only seen by divers.  Full habitat range is listed.