Focal invasive species that will be investigated during InvasiBES in three local case studies planned in the Ebro River (Spain) (a) the blue crab (Callinectes sapidus) and (b) apple snail (Pomacea canaliculata); the French Alps lowlands (c) the Canadian goldenrod (Solidago canadensis) and (d) Himalayan Balsam (Impatiens glandulifera); and in marine habitats of California (e) the red-rust bryozoan (Watersipora subtorquata) and (f) the dark unicorn sea snail (Mexacanthina lugubris). (All photos licensed through CC BY-SA 3.0).