Royal Barnacle
Austromegabalanus nigrescens
Features
Tall steep-sided, 6 shell plates, white to pale blue or green; bright blue mantle visible insider aperture. Largest barnacle in Moreton Bay region, to about 30 mm across and 40-60 mm high.
Notes
Common on rocks on exposed rocky headlands, lower tidal zone down to 9 m depth. Indigenous, southern Australia north to Queensland.
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