An Acorn Barnacle

Gulf of St. Lawrence (unspecified region), Saguenay Fjord, northern Gaspe waters, downstream and upstream part of middle St. Lawrence estuary, southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: Eastern Bradelle Valley), Magdalen Islands (from Eastern Bradelle valley to the west, as far as Cape North, including the Cape Breton Channel), lower St. Lawrence estuary, Prince Edward Island (from the northern tip of Miscou Island, N.B. to Cape Breton Island south of Cheticamp, including the Northumberland Strait and Georges Bay to the Canso Strait causeway), Upper North Shore (between Sept- Iles and Pointe des Monts), middle North Shore (from Sept - Iles to Cape Whittle, including the Mingan Island), lower North Shore, South slope of Anticosti Island; western slope of Newfoundland, including the southern part of the Strait of Belle Isle but excluding the upper 50m in the area southwest of Newfoundland; Cobscook Bay

This is a boreal species distributed in the North Pacific and the North Atlantic. It has a similar distribution as B. balanus, a species it is often associated with.

intertidal, infralittoral and circalittoral of the Gulf and estuary