Cover photo by Stewart Bruce MacLachlan. Find the Blue Riverjack in the FBIS database (Freshwater Biodiversity Information System) here. Family Platycnemididae Identification Medium sized with a robust build. Length reaches 41mm; Wingspan attains 56mm. The Blue Riverjack is unlike any other South African species. Males are strikingly coloured in bright blue and black bands and … Continue reading Blue Riverjack (Metacnemis valida)