Sea otters are remarkable marine mammals that exhibit unique behaviors, particularly in their use of tools. They utilize rocks to crack open hard-shelled prey such as clams and crabs, demonstrating impressive problem-solving abilities. Female sea otters are more likely to employ these tools due to their smaller size and weaker bites, which necessitate efficient foraging methods, especially while raising pups. Interestingly, sea otters often carry a favorite rock in a pocket of loose skin under their forearms, keeping it for months or even years. This behavior is not driven by emotional attachment but rather by the efficiency of using a reliable tool. Additionally, sea otters engage in playful interactions with rocks, showcasing their intelligence and social behavior. Observations suggest that they sometimes gift stones to one another, indicating potential social bonding. Overall, the study of sea otters' rock use highlights their adaptability and intelligence in the wild, reinforcing the idea that tool use is not exclusive to humans but is a behavior shaped by necessity in various species.