Underwater harvesting refers to the collection of marine resources from oceans, seas, and other bodies of water. This practice includes gathering seafood like fish, shellfish, and seaweed, as well as other valuable materials such as coral and sea cucumbers. It is often conducted by commercial fishermen, divers, and aquaculture farms, which cultivate marine life for food and other products. The methods of underwater harvesting can vary widely, from traditional fishing techniques to modern technologies like submersible drones and underwater robots. Sustainable practices are increasingly emphasized to protect marine ecosystems and ensure that resources are not depleted, promoting a balance between human needs and environmental health.