General Description

Four brown side plates (red-brown in young animals), with white ridges that radiate from the opening to the edge. Six pairs of black spots on the white mantle (visible in the opening when the animal emerges). Opening pentagonal shape. Up to 5 mm high, 2 cm wide.

Biology

Secret Four-plated Barnacles live in similar habitats to the related Modest Four-plated Barnacle, but usually attach to rocks higher on the shore.

Habitat

Estuaries and sheltered bays, at mid to high tide levels.

Reefs

Coastal shores

Distribution guide

Southern Australia.

Species Group

Barnacles › Acorn barnacles

Depth

Shore (0-1 m)

Water Column

On or near sea floor

Max Size

2 cm

Diet

Plankton or Particles

Commercial Species

No

Global Dispersal

Native to Australia

Identify

• Barnacles

Conservation Status

• DSE Advisory List : Not listed
• EPBC Act 1999 : Not listed
• IUCN Red List : Not listed