Species

Balanus nubilus (Giant acorn barnacle)

Balanus nubilus. Photo: (c) Karolle Wall, some rights reserved (CC BY-NC)

iNaturalist • Wikipedia

Balanus nubilus, commonly called the giant acorn barnacle, is the world’s largest barnacle, reaching a diameter of 15 centimetres (5.9 in) and a height of up to 30 centimetres (12 in), and containing the largest known muscle fibres.

— Wikipedia

Sightings

Where in Humboldt

Discussion

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