As a marine mammal observer, you are a specialist whose duties involve monitoring whales, dolphins, and other ocean-dwelling mammals. In this field, you track marine mammals visually and use tools like hydrophones to detect the sound of a nearby whale or dolphin. You may also attach a physical tag with a transmitter to track an animal. Your responsibilities involve tracking these animals for scientific research purposes, studying the effect of commercial or industrial operations, such as oil drilling or construction, and ensuring that businesses and individuals abide by regulations meant to protect marine mammal habitats.