Seanet Low Intertidal

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Megabalanus californicus (Pilsbry, 1916)
Phylum Arthropoda, Subph. Crustacea, Class Thecostraca, Subcl. Cirripedia, Order Thoracica, Family Balanidae

Acorn barnacle to 30 mm diameter, shell plates with longitudinal red and white stripes; mantle margin with orange, blue, yellow, & red - most colorful local barnacle.

Common but patchy; low intertidal zone and subtidal on rocky substrate; most frequently seen in clusters on buoys & pilings.

Geo Range: northern California to Gulf of California
Synonyms: Balanus tintinnabulum californicus
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