The Giant Otter (Ptenura brazilinsus) is the largest of all the world's otter species. It reaches a length of between 6 and 8 feet and weighs between 40 and 75 pounds. While all other otter species are solitary, the giant otter lives in social groups of between 5 and 20 individuals. Giant otters are highly endangered; it is estimated that there are only approximately 1000 individuals remaining in Guyana. There is a representative of this species currently housed at the Guyana Zoo. She is an adolescent female named 'Sushi'. Sushi is an active, entertaining resident of our zoo who offers hours of fun for visitors who take the time to visit her.