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Southern California Tidepool Organisms Bryozoans – colonial moss animals Cnidarians – stinging invertebrates
Derby Hat Bryozoan Eurystomella spp.
Red Bryozoan Watersipora spp.
Aggregating Anemone Anthopleura elegantissima
Giant Green Anemone Anthopleura xanthogrammica
Sunburst Anemone Anthopleura sola
Echinoderms – spiny-skinned invertebrates
Sea Stars note signs of wasting Bat Star
Patiria miniata
webbed arms
4.7 in (12 cm)
Brittle Star (various genuses)
Various sizes Long, thin arms
Ochre Star Pisaster ochraceus
Giant Pink Sea Star Pisaster brevispinus
Six Armed Sea Star Leptasterias spp.
6 arms, 2.4 in(6 cm)
Sunflower Star Pycnopodia helianthoides
Purple or Red
31.5 in (80 cm)
Sand Dollar Sea Cucumbers Urchins note signs of balding Eccentric Sand Dollar Dendraster excentricus
4 in (10 cm)
California Sea Cucumber Parastichopus californicus
16 in (40 cm)
Warty Sea Cucumber Parastichopus parvimensis
Purple Urchins Strongylocentrotus
purpuratus
Red Urchins Strongylocentrotus
franciscanus
Mollusks – soft invertebrates with a shell or remnant shell
Snails (single, spiraled shelled invertebrate) Turban Snail
Tegula spp.
Top view
1 in (2.5 cm)
Periwinkle Snail Littorina spp.
Kellet’s Whelk Snail Kelletia kelletii
Dog Whelk Snail (Dogwinkles)
Nucella spp.
Unicorn Whelk Snail Acanthinucella spp.
1.6 in (4cm)
Scaly Tube Snail Serpulorbis squamigerus
Bi-Valves (2 shelled invertebrates) Abalone
California Mussel Mytilus californianus
Blue Mussel Mytilus trossulus/galloprovincialis
Olympia Oyster Ostrea lurida
Pacific Oyster Crassostrea gigas
Rock Scallop Crassedoma gigantea
Haliotis spp.
Limpets Chitons Octopus Giant Keyhole Limpet
Megathura crenulata Rough Limpet
Macklintockia scabra
Volcano Limpet Fissurella volcano
Lottia spp. Limpets
Octopus spp.
Nudibranchs Sea Hare California Aglaja
Navanax inermis
California Blue Dorid Felimare californiensis
Spanish Shawl Flabellina iodine
Hopkin’s Rose Okenia rosacea
Phidiana hiltoni
Aplysia spp.
This document was prepared in 2016 by the Aquarium of the Pacific (AOP) for educational purposes only, not for sale.
The original source is hyperlinked to each image in the digital version of this document.
Snapshot CAL Coast’s “Most Wanted Species”
Organism comes in a variety of colors
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
cm
5 in (13 cm)
2 in
(5 cm)
6 ½ in
(16.5 cm) ½ in (1.5 cm)
10 in
(25 cm)
6 in (15 cm)
12 in (30.5 cm)
3 in
(7.6 cm) 5 in (13 cm)
10 in (25 cm) long
3.5 in (90 mm) 3.1 in (8 cm) 1.1 in (3 cm)
note observations
of dead abalone
6.5 in (12cm)
< 15ft (< 5 m)
closed
open
10 in
(25 cm)
11 in
(28 cm)
4 in
(10 cm)
7in
(17 cm)
2 in (5 cm) open closed
6.7 in (17 cm)
closed
open
10 in (25 cm) 1.6 in
(40 mm)
1.4 in
(3.5 cm)
1-3 in
(3-8 cm)
Adult
Juvenile
16 in
(40 cm) 19.7 in (50 cm) 8.7 in (22 cm)
has small
black tipped warts
(projections)
4 ½ in (11 cm) 6 in (15 cm)
invasive native
http://previews.123rf.com/images/freerlaw/freerlaw1304/freerlaw130400036/18974762-two-abalone-shells-on-a-white-background-Stock-Photo-abalone-shell-pearl.jpghttp://www.marinelifephotography.com/marine/mollusks/gastropods/periwinkles/periwinkles.htmhttps://www.inaturalist.org/observations/2813904http://www.asnailsodyssey.com/LEARNABOUT/WHELK/whelSpin.phphttp://www.dreamstime.com/stock-photo-california-mussel-mytilus-californianus-large-edible-image48987746http://online.sfsu.edu/bholzman/courses/Fall02 projects/sandollar/sanddollar.htmlhttp://soundwaterstewards.org/ezidweb/animals/Parastichopus.htmhttps://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQuC7ffmvGItVYtlWrNXeMJ_xXjvCY6HaZB9zyBfUipTrEF4GH5ewhttp://www.marinebio.net/marinescience/03ecology/tplow.htmhttp://www.marinebio.net/marinescience/03ecology/tplow.htmhttps://www.sbir.gov/sites/default/files/SBAsuccess_StellarBiotechnologies_FINAL.pdfhttp://nathistoc.bio.uci.edu/Molluscs/Stenoplax conspicua.htmhttps://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Macklintockia_scabra_001.jpg/220px-Macklintockia_scabra_001.jpghttps://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQJJ8nwnmRV3dNL-767Pnv57MwflH-u2IChlGZ9EicVRcL1wXhshttp://soundwaterstewards.org/ezidweb/animals/Eurystomellabilabiata.htmhttp://seanet.stanford.edu/Bryozoa/#Watersipora_subtorquatahttp://seanet.stanford.edu/Bryozoa/#Watersipora_subtorquatahttp://soundwaterstewards.org/ezidweb/animals/Anthopleuraelegantissima.htmhttp://www.montereybayaquarium.org/animal-guide/invertebrates/giant-green-anemonehttp://week.divebums.com/2007/Jun11-2007/index.htmlhttp://static.inaturalist.org/photos/564934/medium.jpg?1383598743http://nathistoc.bio.uci.edu/Echinos/Parastichopus.htmhttp://www.biolib.cz/en/image/id102326/?orderby=2&uid=3973http://biology.fullerton.edu/biol317/ftm/ft_s10_AC_1_10.htmlhttp://www.asnailsodyssey.com/LEARNABOUT/MUSSEL/mussPred.phphttps://www.registrelep-sararegistry.gc.ca/095D1748-5C90-4752-92BF-4F4103240EEF/c001.jpghttp://www.elrincondelmalacologo.com/Web fotos marinos no gasteropodos/Fotos coleccion/Ostreidae/Crassostrea gigas 1.jpghttp://naturalista.conabio.gob.mx/observations/1112101https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Fissurella_volcano.jpg/220px-Fissurella_volcano.jpghttp://soundwaterstewards.org/ezidweb/animals/LottiadigitalispeltaTecturapersonascutum.htmhttp://soundwaterstewards.org/ezidweb/animals/LottiadigitalispeltaTecturapersonascutum.htmhttps://en.wikipedia.org/wiki/Octopus_(genus)#/media/File:Octopus_Vulgaris.jpghttp://species.divebums.com/images/Felimare-californiensis_6789_Merry-Passage.jpghttps://upload.wikimedia.org/wikipedia/commons/thumb/9/94/Spanish_Shawl_nudibranch.jpg/525px-Spanish_Shawl_nudibranch.jpghttp://www.archive.xray-mag.com/files/AplysiaC2.jpghttps://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQuC7ffmvGItVYtlWrNXeMJ_xXjvCY6HaZB9zyBfUipTrEF4GH5ewhttps://girlsofsummerlist.files.wordpress.com/2013/06/sunflower_starfish.png?w=590http://www.pbase.com/image/116647193http://soundwaterstewards.org/ezidweb/animals/Aggregatinganemonesinsmallclump.htmhttps://www.flickr.com/photos/riffle_nature_photos/15784280287https://www.flickr.com/photos/carissathomas/392193097http://www.ci.cannon-beach.or.us/docs/HRAP/KeyIDpdf/Intertidal Animals (Invertebrates)/Anemone/aggregating.pdfhttps://upload.wikimedia.org/wikipedia/commons/5/55/Phidiana_hiltoni.jpghttp://ww1.prweb.com/prfiles/2011/12/08/9025683/gI_66265_abalone3.pnghttp://www.asnailsodyssey.com/LEARNABOUT/MUSSEL/mussPred.php
Southern California Tidepool Organisms Arthropods – invertebrates with jointed limbs & an exoskeleton
Barnacles
Common Acorn Barnacle
Balanus glandula
Gooseneck Barnacle Pollicipes polymerus
Little Brown Barnacle Chthamalus dalli
Red Thatched Barnacle Tetraclita rubescens
White-Ribbed Red Barnacle
Megabalanus californicus
Crabs Lobsters Hermit Crab Pagurus spp.
Kelp Crab Pugettia spp.
Masking (Decorator) Crab Loxorhynchus crispatus
Striped Shore Crab Pachygrapsus crassipes
California Spiny Lobster Panulirus interruptus
note observations of molts
Shrimp Isopods
Broken back Shrimp Heptacarpus spp.
Ghost Shrimp Callianassa spp.
Grass Shrimp Penaeus monodon
Kelp Isopods Idotea wosnesenskii
Rock Lice Isopods Ligia occidentalis
Scavenging Isopod Cirolana harfordi
Annelids – segmented worms Chordates – animals with a backbone
Sand-Castle Tube Worm Phragmatopoma californica
Spiral Tube Worm Spirorbis spp.
Kelp Fish Heterosticbus spp.
Opaleye Fish Girella nigricans
Wooly Sculpin Fish Clinocottus analis
Non-Animals Phaeophytes – Brown Algae
Feather Boa Kelp Egregia menziesii
Giant Kelp Macrocystis pyrifera
Laminaria Laminaria spp.
Pod-weed Halidrys siliquosa
Spindled Rockweed Pelvetia fastigiata
Rockweeds Fucus gardneri
Devil Weed
Sargassum horneri
Japanese Wireweed Sargassum muticum
Sea Cabbage Kelp Saccharina sessilis
Stipe-less
Sea Palm Postelsia
palmaeformis
23.6 in (60 cm tall) on unprotected rocks
Wakame Undaria pinnatifida
Chlororophytes – Green Algae Rhodophytes – Red Algae Caulerpa Caulerpa taxifolia
Sea Lettuce Ulva spp.
Dead Man’s Fingers Codium fragile
Encrusting Coralline Algae
Lithothamnion spp.
Red Comb Weed Plocamium cartilagineum
Tidepool Coralline Corallina spp.
Tar Spot Algae Mastocarpus papillatus
can be red or brown in color
Anthophytes – Flowering Plants Porifera – Sponges
Pickleweed Salicornia virginica
Eel-Grass Zostera spp
Long,
Flat blades Grows in Mud
Surf-Grass Phyllospadix spp.
Long,
Wiry blades Grows on Rocks
Orange Encrusting Sponge
Red – Orange, Soft texture
Purple Encrusting Sponge Haliclona permollis
Red Encrusting Sponge Ophlitaspongia spp.
Red –Yellow, velvety texture
This document was prepared in 2016 by the Aquarium of the Pacific (AOP) for educational purposes only, not for sale.
The original source is hyperlinked to each image in the digital version of this document.
Snapshot CAL Coast’s “Most Wanted Species”
Organism comes in a variety of colors
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
cm
1 ½ in
(4 cm)
1 ½ in
(4 cm)
3.5 in
(8.8 cm) 1 ½ in
(4 cm)
12 in
(30 cm)
2.4 in
(6 cm)
24 in
(61cm)
Adult
26in (66cm) 7in
(18cm)
Diameter ¾ in (1.8 cm)
High 0.4 in (1 cm)
Diameter 2 in (5.1 cm)
High 2 in (5.1 cm)
Diameter 2.4 in (6 cm)
High 2 in (5.1 cm)
Diameter ¼ in (6 mm)
High 0.1 in (4 mm)
High 3 in (10 cm)
Juvenile
2 ½ in (6.4 cm) 12 in (30 cm) 1.6 in
(40 mm)
1 in
(2.5 cm)
¾ in
(2 cm) 5 in (12.5 cm)
on protected rocks
http://adriatic-maritime.org/digital-field-guide/http://slideplayer.com/slide/4627081/http://www.cabrillomarineaquarium.org/exhibits/socal-species-details.asp?id=34https://upload.wikimedia.org/wikipedia/commons/5/5a/Pollicipes_pollicipes.jpghttp://m6.i.pbase.com/g4/38/733338/2/91011956.g0MPbHvr.jpghttp://static.inaturalist.org/photos/1130740/medium.JPG?1411414346http://funscubadiver.com/gallery/california-scuba-photo/california-giant-kelpfish.jpghttp://soundwaterstewards.org/ezidweb/seaweeds/Ulvaria.htmhttps://www.hawaii.edu/reefalgae/invasive_algae/chloro/caulerpa_taxifolia.htmhttp://www.seaweed.ie/_images/Img0023.pnghttp://www.centralcoastbiodiversity.org/sea-cabbage-bull-saccharina-sessilis.htmlhttp://soundwaterstewards.org/ezidweb/animals/Chthamalus.htmhttp://soundwaterstewards.org/ezidweb/animals/Chthamalus.htmhttp://img-aws.ehowcdn.com/600x600p/photos.demandstudios.com/getty/article/110/29/87521518.jpghttp://soundwaterstewards.org/ezidweb/animals/Pugettiagracilis2.htmhttp://www.asnailsodyssey.com/IMAGES/CRAB/Wicksten1980Fig2.jpghttp://www.takuyamorihisa.com/gallery/animalia/arthropoda/malacostraca/decapoda/grapsidae/pachygrapsus/crassipes/p_crassipes_800.jpghttp://www.eatsxm.com/uploads/1/3/8/6/13862036/5983587.jpg?280https://c2.staticflickr.com/8/7522/15760832796_f06c9cffb0_b.jpghttp://www.ecomare.nl/fileadmin/ecomare/encyclopedie-nieuw/content-vleet.php?id=3666&language=2http://api.ning.com/files/ENQzNaqHmJ5FvQvhnJv5*IGkfmnE5tMqRETAXfcJ8tGSBncGeacGnd8Um0Pr9XuKoblQIoLMT3QoqnW3AG-6QscIhhSLw15q/Commongrassshrimp.jpghttp://www.boldsystems.org/pics/_w300/RBCMI/DSC_1672+1443640141.JPGhttp://static.inaturalist.org/photos/2148325/medium.jpg?1437198723http://images.onset.freedom.com/ocregister/article/kpilqz-03edge1large.jpghttp://upload.wikimedia.org/wikipedia/commons/thumb/0/06/SandcastleWormColony.png/1280px-SandcastleWormColony.pnghttp://farm4.staticflickr.com/3286/3115919209_18aff92dd3.jpghttps://upload.wikimedia.org/wikipedia/commons/2/28/Sandcastle_worm_in_laboratory_closeup.jpghttps://s3.amazonaws.com/classconnection/619/flashcards/6366619/jpg/ah-tube-worms-spirorbis-spirorbis-4071-149641DD3DC3A3421C5-thumb400.jpghttp://www.troutnut.com/im_regspec/picture_3150_large.jpghttp:/www.troutnut.com/im_regspec/picture_3150_large.jpghttp://www.smithsonianmag.com/arts-culture/these-delicate-images-of-seaweed-were-captured-using-a-flatbed-scanner-180950324/?no-isthttp://www.cosee-west.org/oceanglobe/photos.htmhttp://faculty.washington.edu/mdethier/Fucus/images/DemoFucus.jpghttp://www.seaweed.ie/_images/P9022793.jpghttp://www.dereilanatureinn.ca/lagoon/marine-guide/imgs2/30EncrustingCoralline Algae. Lithothamnion.jpghttps://www.hawaii.edu/reefalgae/invasive_algae/chloro/caulerpa_taxifolia.htmhttps:/vipvoice.wordpress.com/common-seaweeds-of-cabrillo/https://www.hawaii.edu/reefalgae/invasive_algae/chloro/caulerpa_taxifolia.htmhttps:/vipvoice.wordpress.com/common-seaweeds-of-cabrillo/https://s3.amazonaws.com/classconnection/619/flashcards/6366619/jpg/coroff-14963FBBBA53ED12CE7-thumb400.jpghttps://s3.amazonaws.com/classconnection/619/flashcards/6366619/jpg/coroff-14963FBBBA53ED12CE7-thumb400.jpghttp://i2.wp.com/philwendt.com/wp-content/uploads/2011/09/04_D3S7861.jpghttps://theoutershores.com/2014/09/23/coming-full-circle-with-hermissenda-crassicornis/https://theoutershores.com/2014/09/23/coming-full-circle-with-hermissenda-crassicornis/http://soundwaterstewards.org/ezidweb/animals/Haliclonasp..htmhttp://soundwaterstewards.org/ezidweb/animals/Haliclonasp..htmhttp://soundwaterstewards.org/ezidweb/animals/Ophlitaspongiapennata.htmhttp://soundwaterstewards.org/ezidweb/animals/Ophlitaspongiapennata.htmhttp://m6.i.pbase.com/o2/87/342487/1/124256736.SKgR6WHg.f01_9968.jpghttp://www.clovegarden.com/ingred/img/al_kelpg01h.jpghttp://slideplayer.com/slide/4627081/http://www.seaweed.ie/_images/Img0021.pnghttp://www.sitkanature.org/wordpress/wp-content/gallery/aaronbaldwinmarine/balanus glandula 02.jpghttp://www.cosee-west.org/oceanglobe/photos.htmhttp://soundwaterstewards.org/ezidweb/seaweeds/Codiumfragile.htmhttp://californiadiver.com/wp-content/uploads/2014/07/Blades-of-immature-Sargassum-horneri.jpghttps://scripps.ucsd.edu/labs/coralreefecology/wp-content/uploads/sites/84/2012/12/Sargassum-horneri-adult.jpghttp://www.natgeocreative.com/comp/MM7/849/1442041.jpg