Hydroids, Corals, Sea Anemones, Jellyfish, Comb Jellies

Columbia Sand Anemone

Columbia Sand Anemone
Urticina columbiana
Alternate Name: Sand Anemone, Tealia cohum
Size: to 6″ (15cm) high, 3′ (1m) diameter or more
Range: Vancouver Island to Baja California
Habitat: Partially buried in sand-mud-shell, subtitdal to 150′ (45m)
Description: Column encircled by rough tubercles. Long slender tentacles.
Comments: One of the largest anemones in the world. Candy stripe shrimp are often found associated with them.

Orange Plumose Anemone

Orange Plumose Anemones
Metridium giganteum
Size: To 3′ (1m) high
Range: Alaska to Southern California
Habitat: Attached to hard surfaces, intertidal to 1,000feet ( 300m)
Description: White, brown, orange,. Usually with more than 200 slender, translucent tentacles, crowning a smooth column. Lobed oval disk
Comments: Common in dense aggregations. Long threas with stinging capsules from moth and special tentacles defined territory against other colonies or anemone species. Attacked by the shaggy mouse nudibranch and leather star. Species found on northern Atlantic coast as well as the Pacific

Orange Sea Pen

SeaPen, Taken Whytecliff Park
SeaPen, Taken Whytecliff Park

Orange Sea Pen
Ptilosarcus gurneyi
Alternate Name: Gurney’s Sea Pen
Size: To 18″ (46cm) high, 4″ (10cm) wide
Range: Prince William Sound to Central California
Habitat: Intertidal and common in shallow subtidal, to 330 feet (100m) or more
Description: Orange Fleshy stalk and branches with many polyps
Comments: Eaten by striped nudibranch, diamond back triton and other nudibranchs; by several sea stars, including leather, spiny red, rose, vermilion and other sea stars

Sea Whip

Sea Whip
Balticina septentrionalis
Size: To 8; (2.5m) high
Range: Alaska to Puget Sound
Habitat: In Sand-mud, 65′ and deeper
Description: Slender, short white branches with polyps on a thick supporting rod.
Comments: One of the largest sea pens seen by divers. Another Deep water sea pen can reach heights of 9′ (2.7m).

White Sea Pens


White Sea Pen
Size: To 8″ (20cm) across, 12″ (30cm) high
Range: Alaska to California
Habitat: Anchored in the mud, 50′ (15m) and deeper
Description: Slender, delicate white branches
Comments: Cut down and eaten by nudibranch pink tritonia.  There may be several species of this sea pen in the shallow subtidal.

Tube-Dwelling Anemone

Tube-Dwelling Anemone
tube anemone, burrowing anemone
Pachycerianthus fimbriatus

Size: Tentacle crown to 30cm (12 in) across tube to 1m (39in) long
Range: Alaska – Mexico
Habitat: intertidal to at least 30m (100 ft)
Comments: This anemone, the principal prey of and even a spawning site for the Giant Nudibranch, often forms fields on level substrates.  It’s buried tube is truly and ugly site when exposed.

Crimson Anemone

Crimson Anemone, taken at Whytecliff Park
Crimson Anemone, taken at Whycliff Park
Crimson Anemone, taken at Whycliff Park
Crimson Anemone, taken at Whycliff Park

Crimson Anemone
Cribrinopsis fernaldi
Common Name: Snakelock Anemone
Size: Column to 8″ (20 cm) high
Range: ALeutian Islands to Puget Sound
Habitat: On the rocks, subtidal to 1,000 (300m) or more
Description: Crown with long, slender drooping tentacles that drape over column and have distinctive raised zigzag lines.  Colour varies from white to pink to red. Upper column has longitudinal rows of tubercles; oral disk has lines radiating from the mouth.

Orange Cup Coral

Orange Cup Coral
Orange Cup Coral
Orange Cup Coral
Orange Cup Coral

Orange Cup Coral
Common names: orange-red coral, orange coral, cup coral, solitary orange cup coral, solitary coral, vivd orange-red solitary coral.
Balanophyllia elegans
Size: 2.5 cm (1in) across, 1cm (0.4 in) tall
Range: Alaska to Mexico
Habitat: Intertidal to 48 m (160ft)
Description:  All in all hard corals, each polyp secretes and “sits on” a circular calcium  disc as seen in this photograph.  This species is solitary, unlike tropical reef-building relatives but like virtually all others in the Pacific Northwest.

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