Explore the captivating world of the Big Lutrine Opossum (*Lutreolina crassicaudata*), a semi-aquatic marsupial native to South America. With its distinctive otter-like behavior, webbed feet, and unique adaptations that enable it to thrive in wetland habitats, this elusive creature plays a vital role in its ecosystem. Learn about its fascinating physical characteristics, nocturnal habits, and the importance of conservation efforts to protect this remarkable species.