NEW BRUNSWICK: Kings Co.: Nerepis River, 26.VIII.1987, R.F. Miller, (1, NBM).
Gyrinus fraternus is newly recorded in New Brunswick. It was recorded from Nova Scotia by Roughley (1991) and from Prince Edward Island by Oygur and Wolfe (1991), Roughley (1991), and Majka (2008) (Fig. 9). Morrissette (1979) reported that it preferred clear, fluvial lakes with muddy bottoms. Oygur and Wolfe (1991) reported it from lotic (56%) and lentic (45%) habitats.