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Phylum Arthropoda
Class Cirripedia
Barnacles
| Barnacles are filter-feeding animals permanently attached to rocks or
floating items and debris. |
HAWAII
Lepas anserifera
Waimanalo Beach, Oahu |
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PELAGIC GOOSE BARNACLE
| Common on marine debris including fishing floats, lines, bottles,
wood, plastic, etc. Worldwide distribution. |
Nesochthamalus intertextus
Kaupo, Oahu
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Kaupo, Oahu |
Mokuleia, Oahu
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Portlock, Oahu |
Black Point, Oahu |
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PURPLE ROCK BARNACLE
| Common on rocks in the splash zone. Up to 1/2 inch.
Endemic to Hawaii. |
Paralepas sp.
Blowhole, Oahu, on Swimming Crab
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PARASITIC CRAB BARNACLE
| Attached to crabs. About 1/4 inch tall. |
NORTHEAST PACIFIC
 
Balanus nubilus
Ogden Point, Victoria, Canada, 40 feet
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GIANT BARNACLE
| Abundant on hard surfaces exposed to strong current. Cirri are
reddish. Up to 4 inches. Alaska to San Diego. |
Semibalanus
cariosus
Ogden Point, Victoria, Canada, 4 feet
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THATCHED BARNACLE
| Abundant on rocks in shallow water. Shell is covered with many
ridges. Cirri are black. Attains 2.5 inches. |
Pollicipes polymerus
Ogden Point, Victoria, Canada, 2 feet
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Ogden Point, Victoria, Canada, 2 feet |
Ogden Point, Victoria, Canada, 2 feet
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GOOSE BARNACLE
| Abundant on hard surfaces in the intertidal zone exposed to wave
action. Up to 4 inches tall. Alaska to Baja California. |
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