Pups are often left alone when the mother is feeding. They are not abandoned and should be left alone. Marine mammals are more likely to be disturbed when more than one boat is near them. Avoid approaching the animals when another vessel is near. When several vessels are in an area, communication between operators will help ensure that you do not cause disturbance.
Marine mammals have sensitive hearing and many species communicate by vocalizing underwater.
Underwater sound produced by a vessel s engines and propellers can disturb these animals. Erratic swimming patterns. Escape tactics such as prolonged diving, underwater exhalation, underwater course changes, or rapid swimming at the surface. Tail slapping or lateral tail swishing at the surface. Female attempting to shield a calf with her body or by her movements.