Ridged slipper lobster ( Scyllarides nodifer )

A type of prawn/shrimp , family Sergestidae . Genus and species unknown.

Spiny rock shrimp ( Sicyonia burkenroadi )

Beau's murex ( Chicoreus beauii , synonym Siratus beauii )

Beau's murex ( Chicoreus beauii , synonym Siratus beauii )

Humpback shrimp ( Solenocera vioscai )

A species of mantis shrimp ( Squilla chydaea )

Yellowline arrow crab ( Stenorhynchus seticornis )

The blind lobster (Polycheles sculptus ; Synonym: Stereomastis sculpta )

A species of pencil urchin ( Stylocidaris affinis )

Bottom view of a species of pencil urchin ( Stylocidaris affinis )

Close up of bottom view a species of pencil urchin ( Stylocidaris affinis )

Close up view of a species of pencil urchin ( Stylocidaris affinis )

A species of pencil urchin ( Stylocidaris affinis )

A species of deepsea shrimp (Systellaspis pellucida )

Boulders and cobbles at the high tide line. First colonization by barnacles.

Rocky shore with barnacles, brown algae, and block of white conglomerate with rounded cobbles embedded An occasional limpet seen.

Vertical rock outcropping showing tidal zoning from barnacles at hight tide line to sea anemones and gooseneck barnacles further down toward low water line.

Close-up of large and small barnacles.

A shield limpet (Collisella pelta) and numerous barnacles.

An assemblage of gooseneck barnacles (Pollicipes polymerus) and smaller barnacles

An assemblage of gooseneck barnacles (Pollicipes polymerus) and smaller barnacles .

Close-up of gooseneck barnacles (Pollicipes polymerus)

An assemblage of large barnacles

A different species of gooseneck barnacles (Lepas sp.) than seen in images fish4581and fish4582.

A small snail among the barnacles

A colony of mussels (Mytilus sp.)

Two shield limpets (Collisella pelta)

Barnacles, a large snail, and algae

Sand grain tubes possibly for a type of worm

Red, green, and brown algae co-existing at the low-tide line.

A California seagull (Larus californicus).

A California seagull (Larus californicus) perched on an algae covered rock.

Pacific harbor seal (Phoca vitulina) diving to the water below from an algae-covered rock ledge exposed at low tide.

Pacific harbor seal (Phoca vitulina) in the surf

Gooseneck barnacles, brown and green algae, and alarge sea anemone. The sea anemone is the circular animal right above the water at the bottom of the picture.

Various types of algae exposed at low tide

Green algae covered boulders dominate this rocky coast scence. The high tide line can be seen at the top of some of the boulders.

A reddish-orange bat seastar (Patiria miniata)

Large sea anemones (Anthopleura xanthogrammica) closed for protection against drying up at low tide. The rocks they glue on themselves help insulate them and decrease heat absorption by reflecting sunlight.

A shore crab (Cancer antennarius) in a defensive posture. The rock is road gravel and the mussel shells have colored clay used in a crab feeding experiment.

Various types of algae in a tide pool at low tide

A mussel bed

Kelp (Macrocystis pyrifera)

Large brown algae

Kelp (Nereocystis luetkeana) at low tide

Light playing on a tide pool

Chitons nested in an oyster shell

Two large green sea anemones with rounded cobbles

Sea anemones (Anthopleura xanthogrammica), sea urchins (Strongylocentrotus purpuratus),and empty mussel shells (Mytilus sp.) in a tide pool