1 is tail undulation,2 is both flippers in opposite vertical directions, 3 is both flippers going in the same vertical direction,4 is mouth opening and closing,5 is vertical neck movement,6 is horizontal neck movement,7 is horizontal tail movement, and 8 is horizontal flipper movement. This large marine predator stalks the coast. the haunting sea thief belongs to the sea thief family which has 2 extant species and with the coastal haunting sea thief being a subspecies of the haunting sea thief. while not as large as the leviathan sea thief they have garnered a reputation for hunting land based prey which occasionally includes humans.