Behold the giant otter (Pteronura brasiliensis). Of the 14 living otter species known to science, this one is the biggest. Growing up to 5.6 ft (1.7 m) long, this mustelid can reach weights of 70 lbs (32 kg)! It inhabits parts of South America's Orinoco, Amazon, and La Plata river systems, where it lives in groups of up to 20 members. It feeds on fish, crustaceans, and even caiman.
Photo: Charlesjsharp, CC BY-SA 4.0, Wikimedia Commons

















