Balanus nubilus
| Balanus nubilus | |
|---|---|
| Giant acorn barnacles with cirri extended for feeding | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Thecostraca |
| Subclass: | Cirripedia |
| Order: | Balanomorpha |
| Family: | Balanidae |
| Genus: | Balanus |
| Species: | B. nubilus |
| Binomial name | |
| Balanus nubilus Darwin, 1854 | |
Balanus nubilus, commonly called the giant acorn barnacle, is the world's largest barnacle, reaching a diameter of 15 cm (6 in) and a height of up to 30 cm (12 in), and containing the largest known muscle fibres.