Acts upstream of or within apical constriction; cellular protein localization; and regulation of actin filament-based process. Located in apical junction complex. Is expressed in several structures, including lung; medulla oblongata basal plate; submandibular gland primordium; thymus primordium; and vibrissa. Orthologous to human FRMD6 (FERM domain containing 6). [provided by Alliance of Genome Resources, Apr 2022]