moving fast in water has a positive impact on an aquatic animal's survival
when_ducks_move_across_water is in_water. fish is aquatic_animal. treading_water is aquatic_body_movement. waves is moving_water. splashing is aquatic_body_movement. migratory_animal is animal. moving_water is running_water. running_water is moving_water. aquatic_ecosystem is water. swimming is aquatic_body_movement.