Echinoderms — sea stars, urchins, cucumbers Mollusks — clams, snails, chitons, octopus

Ochre Star Leather Star Pink Short-Spined Star Mottled Star Pisaster ochraceus Asteriopaia imbricata Pisaster brevispinus Evasterias troschelii To 14” in diameter To 12” in diameter To 26” in diameter To 16” in diameter http://dnr.metrokc.gov http://dnr.metrokc.gov Orange, purple, or brown with Upper surface is gray with Pink to almost white with short Similar to ochre star but a network of white spines. patches of red, brown, and spines. Five large, stiff arms. smaller disc. Orange, brown, Mossy Chiton Lined Chiton Red Octopus Nuttall’s Cockle Five stout arms. Shorter, purple. Smooth to the touch, or blue-gray with five long, Mopalia muscosa Tonicella lineate Mantle to 4” Clinocardium nuttallii thicker arms than mottled star. with a garlic-like odor. slender arms. To 2 ¾” long To 2” long Octopus rubescens To 5 1/2” long. Eight plates that are brown, Eight plates with light and dark Arms to four times body Shell is as high as it is long, gray, or black. Outer girdle zigzag lines in a variety of length. Can be red to brown covered with prominent ribs. covered in stiff hairs. colors from pink to orange-red. with white mottling. Rough Heart-shaped from side view. skin.

Photographed by Jen Mack

Sunflower Star Stimpson’s Sun Star Blood Star Green Sea Urchin Pycnopodia helianthoides Solaster stimpsoni Henricia leviuscula Strongylocentrotus To 39” in diameter To 16” in diameter To 8” in diameter droebachiensis Photographed by Walter Siegmund Yellow, orange, brown, pink, Blue, pink, red, or orange with Usually blood red, often with a To 3 ¼” wide, spines to 1” red, or purple. A broad, soft a blue or purple stripe down gray patch. Typically with five Usually green-brown with Lewis’s Moon Snail Checkered Periwinkle Pacific Blue Mussel Rock Jingle disc with up to 24 arms. each slender arm. Usually 10 slender arms. short spines. Lunatia lewisii Littorina scutulata Mytilus trossulus Podoesmus macroschisma arms. To 5 ½” high To 5/8” long To 6” long ,usually smaller To 5 1/4” long Yellowish to brown shell with Smooth brown or black, Two blue to black shells, Attaches to rocks with low six rounded whorls. Enormous elongated shell. Often sometimes tan or brown. profile. Gray-white upper shell Other pink to brown, fleshy foot. checkered with white spots. is larger and covers donut Usually found in the splash shaped lower shell. zone, can only survive for a short time underwater.

Slipper Cucumber Orange Sea Cucumber Psolus chitonoides Cucumaria miniata To 5” diameter To 4-8” long Shiny Orange Sea Squirt Kelp Lace Bryozoan Red to pale yellow with hard Orange-red to brown with Cnemidocarpa finmarkiensis Membranipora serrilamella Photographed by Lore plates. Red tentacles have rows of brown tube feet. To 3” long To 1-7” in diameter white tips. Resembles a chiton Bright orange feeding Shiny orange in color. Soft and White crust-like growths Ribbed Limpet Rough Keyhole Limpet Opalescent Nudibranch Shag Rug Nudibranch when out of the water. tentacles at one end of body. does not hold shape out of typically on algae. Circular in Lottia digitalis Diodora aspera Hermissenda crassicornis Aeolidia papillosa water. Look for two siphons shape but several colonies may To 1 1/4” long To 2 3/4” long To 2” long To 3” long protruding from the smooth grow together forming large Ribbed; olive-green to brown Oval shell light brown to gray, Bright colored sea slug with Gray, tan, or brown with many mound shape. patches with lobed margin. with white blotches or dots. often with stripes. Ridges light colored mantle, orange hair-like cerata. radiate from top of shell. stipe along dorsal side, and Prominent off-center opening white stripes along the cerata at top of shell. (hair-like projections). Arthropods — crabs, shrimp, barnacles Cnidarians — sea anemones, jellies, corals

Photographed by Randy Shuman Photographed by Liz Dawson

Red Rock Crab Graceful Crab Purple Shore Crab Hairy Shore Crab Painted Anemone Giant Plumose Anemone Giant plumose anemones Moon Jelly Cancer productus Cancer gracilis Hemigrapsus nudus Hemigrapsus oregonensis Urticina felina Metridium giganteum hanging during low tide. Aurelia Labiata Shell to 8” wide, Shell to 4 ½” wide Shell to 2.5” wide, Shell to 2” wide To 4” across, to 10” high To 4” across at base, 4-16” in diameter female to 6 1/4” wide Legs purple, claws purple with Hides under rocks. Purple in Hides under rocks. Color can Colors vary from green with 4-39” high Translucent, bell-shaped jelly Brick red fan-shaped white tips. color with dark spots on the be purple, gray, green, white, red spots to solid colors White, brown, or orange body with 4 round or horseshoe carapace with back-tipped claws. No hair or setae on or mottled. Look for “hairs” or including light yellow-brown, with frilly tentacles. shaped gonads visible on top. pincers. legs. setae on their legs. white, or red. Tentacles similar to column color. Worms

Photographed by Randy Shuman Kelp Crab Black-clawed Crab Hermit Crab Isopod Pugettia producta Lophopanopeus bellus Various Species Various Species Egg Yolk Jelly Lion’s Mane Jelly Calcareous Tube Worm Parchment Worm Shell to 3 1/2” wide Shell to 1 1/2” wide To 3” long To 1” long Phacellophora camtschatica Cyanea capillata Serpula vermicularis Spiochaetopterus costarum Olive, brown, or red in color. Boxy shell with conical claw Large, oval, black eyes. Green, brown, red-brown, or To 2’ across, tentacles to 20’ To 20” across, tentacles to 10’ To 4” long To 8” long Usually in or on seaweed. tips. Color can be purple, red, Orange, red, or brown in black in color. Found typically Translucent with an Yellow-brown to orange, flat White tube with red, orange, Fragile, jointed tubes or brown with black claw tips. color. Can be found in a variety gripped to the underside of a egg yolk-yellow center. top. Caution! Tentacles can or pink feather-type protruding from sandy Often stiffens with claws out of shells. rock or piece of kelp. Smooth Caution! Tentacles can sting. sting tentacles. substrates. Opaque white to when handled. armored plates on back with brown in color. several pairs of legs ventrally. Fish

Photo by Rosario Beach Photographed by Seattle Aquarium Marine Laboratory

Coonstripe Shrimp Giant Barnacle Acorn Barnacle Thatched Barnacle Pandalus danae Elassochirus tenuimanus Balanus glandula Semibalanus cariosus To 5 1/2” long To 2 3/4” diameter, 4 7/8” high To ¾” in diameter, To 1 1/2” in diameter, Tidepool Sculpin Gunnel Northern Clingfish Fish Eggs Translucent body with reddish Volcano shaped. Dirty white 3/8” high 2 3/8” high Oligocottus maculosus Various species Gobiesox maeandricus Various species brown stripes, thin white lines, shell with bright purple, Volcano-shaped. White to Volcano shaped. To 3 1/2” long To 12” long To 6.5” long Clusters up to 2” wide and blue spots. yellow, or red tissue visible gray. Inner plates close tightly White to grayish, with many Color varies from brown to Gray, green or brown with Gray, green to dark black with Gray, green, purple, blue, red, near the “beak.” to protect the animal from downward pointing spines green to reddish on dorsal long, eel-like body. a light stripe connecting eyes yellow or orange. Found predators and low tides. covering steep walls. side, fading to lighter hues on Sometimes found under rocks and light speckling throughout attached to a hard surface. underside. Five irregular dark in the low tide zone. the body. Suction cup like fin saddles across back. on ventral side.