Ribbed Barnacle
| Name: | Ribbed Barnacle |
| Scientific Name: | Tetraclita stalactifera |
| Family: | Acorn Barnacles |
| Taxonomic: | Tetraclitidae |
| ID Group: | Snails, Clams & Shells |
| Size: | up to 1.25 in. |
| Depth Range: | Shorelines, Tidal pools (0 – 2 ft.) |
| Sightings: | Seen many times |
This Barnacle has thick outer walls with deep grooves running along them. When it is not feeding, a hard plate closes over the opening at the top.
The Ribbed Barnacle lives in shallow waters. It attaches tightly to hard surfaces, commonly to the pillars of piers.