acorn barnacle
- kingdom: Animalia
- phylum: Arthropoda
- class: Maxillopoda
- order: Sessilia
- family: Balanidae
- genus: Balanus
- species: Balanus improvisus
Haapsalu
Lääne
Estonia
Huittinen
Ostrobothnia
Finland
Södertälje
Stockholm
Sweden
Dauphin Island
Alabama
Branford
Branford Center
New Haven
Connecticut
Oriole Beach
Saint Augustine
Florida
Cameron
Louisiana
Astoria
Oregon
Anahuac
Texas
Monterey
Virginia
United States
La Paloma
Rocha
Uruguay