Terebratalia transversa (Sowerby, 1846)
Common Lamp Shell
common, north Mexico to north Alaska
 
Citation:  Pacific Northwest Shell Club, www.PNWSC.org
Brachiopods
Mycalidae
(growing on Chlamys hastata)
Mycale adhaerens (Lambe, 1893)
Smooth Scallop Sponge
subtidal, Washington to Siberia 
Tunicates
Sponges
Halichondriidae
Halichondria panicea (Pallas, 1766)
Yellow-Green Encrusting Sponge
fairly common, north Mexico to north Alaska 
Bryozoans
Metandrocarpa taylori Huntsman, 1912
Orange Social Tunicate
common, south California to south AlaskaTerebrataliidae
 
 
 
                   
                   
                   
                   
                   older references call this a
subspecies - caurina
Miscellaneous Invertebrates
(Oregon to Southeast Alaska)
Click on photo to enlarge.  Scale line in photo equals 1cm unless otherwise specified.
Notations refer to how often they can be found intertidally by 
beachgoers in the Northwest plus their full habitat range.
Lichenoporidae
Disporella separata Osborn, 1953
Purple Encrusting Bryozoan
subtidal; south California & Washington to BC 
Suberitidae
Pseudosuberites montiniger (Carter, 1880)
Peach Ball Sponge
subtidal, north Mexico to north Alaska 
Chalinidae
Haliclona sp.Purple Intertidal Spongesouth California to south Alaska 
Microcionidae
Ophlitaspongia pennata(Lambe, 1895)Velvety Red Spongenorth Mexico to Alaska 
This page last revised: 5-25-2019
Sponges are notoriously hard to identify.  There are a large number 
of species and many which look similar to each other.
If anyone recognizes our unidentified species, please contact us.
unidentified species 3
a yellow encrusting sponge
photo taken at Anacortes, WA
unidentified species 2
similar to species 1 but
with the large pores scattered 
across the top and sides
photo taken at Slip Point, WA
Unidentified Sponges
 
unidentified species 1
similar to an Orange Finger Sponge with 
the large excurrent pores only at the top
photo taken at Slip Point, WA  Polyclinidae
Aplidium solidum (Ritter & Forsyth, 1917)Red Ascidiansouth California to south BC 
 
Suberites domuncula latus Lambe, 1893Hermit Crab Spongesouth California to north Alaska
Styelidae
 
Cnemidocarpa finmarkiensis(Kiaer, 1893)Broadbase Tunicatecommon, central California tosouth Alaska; Japan; circumboreal 
 Laqueidae
Laqueus californianus (Koch, 1848)
California Lamp Shell
infrequently found; south California to
Alaska, Japan