BarnacleBarnacle| Senegal 1968 | Falkland Islands 1994 |
 |
 |
|---|---|
| Littoral Stalked Barnacle Pollicipes mitella (Scalpellidae) |
Pelagic Gooseneck Barnacle Lepas sp. (Scalpellidae) |
A barnacle is an adherence animal having a Mount Fuji-shaped calcic husk. The size is several centimeters from several millimeters. It is classified in Crustacea Sessilia. It was thought that a barnacle was a mollusk same as shellfishs until the early 19th century. However, it was found to hatch as a freely natans nauplius larva as well as the Crustacea such as a shrimp, the crab by J.V. Thompson in 1829, and it came to be classified in Crustacea, and Charles Darwin performed a systematic study of the rock barnacle at the mid-19th century and built the taxonomic basics of rock barnacle.
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