Giant River Otters. In Brazil’s Pantanal, this family group of Giant River Otters were exploring the river bank presumably in search of fish. However, some members of the family decided it was more fun to fool around in the river and on the bank. Fabulous encounter!
The giant river otter (Pteronura brasiliensis) is up to 1.7 metres (5.6 ft) long. Unlike other mustelids, the giant otter is a social species, with family groups of three to eight members. The groups are centered on a dominant breeding pair and are both cohesive and cooperative. The species is territorial, and aggression has been observed between groups. The giant otter is diurnal and is the noisiest otter species. Distinct vocalizations have been documented that indicate alarm, aggression, and reassurance.