Otter, Giant River
5 - 6 feet
Male: 70 - 100 lbs; Female: 48 - 57 lbs
Rainbow trout, Carp, River Fish, Tilapia, Red eye, Bream, Herring, Mackerel, Channel Catfish, Perch.
South America - Orinoco, Amazon and La Plata River systems. Argentina; Bolivia; Brazil; Colombia; Ecuador; French Guiana; Guyana; Paraguay; Peru; Suriname; Venezuela.
Faces of the Rainforest
Their whiskers, which are called vibrissae, are used to detect changes in currents and water pressure. This helps when they are searching for fish and other prey because they can detect the prey's movement.