Käyttäjän nzshells havainnot

Range of individuals from juvenile (~15mm wide) to fully grown (~45mm long). Mid-tide zone.

Length about 70mm. Mid-tide zone

Washed up on Muriwai Beach. The cuttlebone is 17cm long, and the largest barnacle heads are 22mm long.

On a large tree trunk washed up on Muriwai Beach. The largest barnacle heads are 52mm long, and their stalks up to 500mm long x 20mm wide.