MANAUS, BRAZIL – A pair of giant arapaimas was filmed coordinating the protection and guidance of a large school of fry in the crystal-clear waters of the Teles Pires River, in the municipality of Itaúba, in the central-western Brazilian state of Mato Grosso.

One of the world's largest freshwater fish, the arapaima (Arapaima gigas) can grow to more than 3 meters (10 feet) in length and weigh over 200 kilograms (440 pounds). Beyond its remarkable size, the species is also known for its distinctive reproductive behavior and exceptional parental care.

Unlike most aquatic species, whose eggs are abandoned after spawning, arapaimas provide extensive care for their offspring. The footage recorded in Itaúba clearly shows the pair's coordinated division of roles. The male leads and directly protects the group, swimming at the front while guiding the fry and remaining ready to confront any predator or threat that approaches.

The female follows closely behind, securing the rear of the school and ensuring that none of the young become separated along the way.

This coordinated behavior is a key evolutionary strategy that significantly increases the survival rate of juvenile fish in rivers across the Amazon Basin.

Beyond the striking images, rare observations such as this highlight the importance of preserving Amazonian aquatic ecosystems. The arapaima is an iconic species of the region that was once severely affected by overfishing.

Scenes of reproduction and parental care in the wild are considered indicators of a healthy ecosystem and reinforce the importance of conserving rivers and protected areas to safeguard Brazil's wildlife for future generations.

Amazon Agency