acorn barnacle
- kingdom: Animalia
- phylum: Arthropoda
- class: Maxillopoda
- order: Sessilia
- family: Balanidae
- genus: Balanus
- species: Balanus improvisus
Haapsalu
Lääne
EstoniaHuittinen
Ostrobothnia
FinlandSödertälje
Stockholm
SwedenDauphin Island
AlabamaBranford
Branford Center
New Haven
ConnecticutOriole Beach
Saint Augustine
FloridaCameron
LouisianaAstoria
OregonAnahuac
TexasMonterey
Virginia
United StatesLa Paloma
Rocha
Uruguay