Divided into two subfamilies- carnivorous and herbivorous. The herbivorous are commonly called pacus and can grow up to 44 pounds. The carnivorous are much smaller, but are renowned for their ferocity and fearlessness.
Frequently, in the wild, they become stranded in pools due to drought conditions. When this happens they have been known to attack cows, crocodiles, and even humans, and can strip flesh off their prey in minutes.
Native of the Amazon and its tributaries, the Arapaima or Pirarucu, is one of the largest fresh water fish in the world. Specimens of 10 feet in length and weighing 400 pounds are common. Enormous specimens of 15 feet and 1,000 pounds have been reported.
The Arapaima can make an exhale breathing sound that can be heard 100 feet away. Its tongue is so rough that natives use them to grate food.
The Anableps, a four-eyed fish of South America, is the only animal in the world equipped with bifocals.
Its eyes, including its retina and its cornea, are divided horizontally into two sections, one above the water, one below. With its unique “4 eyes” the anableps can hunt for food while keeping a lookout for predators.
POISONOUS DART FROGS
The fantastically colorful Poison Dart Frogs of Central and South America are extremely poisonous. Despite their tiny size, the largest less than 1.5 inches in length, these frogs are highly toxic and some can be lethal to humans.
Native hunters in the rainforest use the poisons from these frogs on the tips of their blow darts and arrows when hunting.COME LOOK, BUT DON'T TOUCH