Potamotrygon henlei 

Habitat & Distribution :  Lower Tocantins & Araguaian basins, Brazil

Diet: Crustaceans, molluscs, fish 

Size : Up to 104 cm 

Lifespan : 12 years

Deskripsi

They possess a dark grey-brown or blackish, roughly diamond-shaped body with distinct yellowish-white spots along the disc edges, and a white underside with broad, dark, dusky edges 

Behavior

These rays are nocturnal, highly predatory, and often bury themselves in sandy or muddy substrates for camouflage. While generally peaceful, they use venomous tail barbs for defense and can be territorial toward other rays. 

Reproduction

This species reproduces via aplacental viviparity, with females giving birth to 2-3 fully developed pups after a 3-4 month gestation. 

Communication & Perception

These stingrays have specialized organs called Lorenzian ampullae located on their heads. These sensors allow them to detect weak electrical impulses in the water, which are used to sense prey and other stingrays. 

Predator(s)

Birds, caimans, larger predatory fish