What do you people that look for treasure that sunken in the sea or ocean?

People who search for treasure sunken in the sea or ocean are often called underwater treasure hunters or salvagers. They typically use advanced technology like sonar, submersibles, and diving equipment to locate shipwrecks and lost cargo. This pursuit can be motivated by historical interest, the thrill of discovery, or the potential for financial gain from recovering valuable artifacts. Many also focus on preserving maritime heritage and understanding the stories behind these shipwrecks.