“ARIRANHA”, or “GIANT OTTER” – ‘PTERONURA BRASILIENSIS’, is an carnivorous mammal. It is the longest member of the MUSTELIDAE, or weasel family, a globally successful group of predators. Unusually for a mustelid, the ARIRANHA is a social species, with family groups typically supporting three to eight members. The groups are centered on a dominant breeding pair and are extremely cohesive and cooperative. Although generally peaceful, the species is territorial and aggression has been observed between groups. ARIRANHA is diurnal, being active exclusively during daylight hours. It is the noisiest otter species and distinct vocalizations have been documented that indicate alarm, aggressiveness, and reassurance. The species prefers freshwater rivers and streams, which are usually seasonally flooded, and may also take to freshwater lakes and springs. It constructs extensive campsites close to feeding areas, clearing large amounts of vegetation. ARIRANHA largely subsists on a diet of fish, particularly characins and catfish, and may also eat crabs. Welcome to the PANTANAL of Mato Grosso do Sul...

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