In the winter (November–April), these fish moved to deeper water (~135 cm) with warmer temperatures, but habitat selection was weak at both scales. Northern snakeheads returned to shallower water (~95 cm) in the prespawn season (April–June) and used milfoil and other cover.Habitat selection was the strongest at both meso-and microhabitat scales during the spawning season (June–September), when fish preferred macrophytes and cover in shallow water (~88 cm).n the winter (November–April), these fish moved to deeper water (~135 cm) with warmer temperatures, but habitat selection was weak at both scales. Northern snakeheads returned to shallower water (~95 cm) in the prespawn season (April–June) and used milfoil and other cover.