There are very few stingrays that inhabit freshwater rather than saltwater & the Motoro stingray is one of them.
They’re also known as the peacock eye or black river stingray and are found in the Amazon River and surrounding waterways.
Stingrays usually live where there is sand and they’ll hide while looking for food. Their advantageous adaptation of having eyes on top of their head allows them to see while remaining stealthy hidden. They can also cleverly make slime, that covers their body, so they can swim faster and be protected from infections.
They’re very intelligent and have excellent eyesight.
They have a tube structure between their eyes and nostrils that allows them to send electrical impulses in the water and they use this to communicate.
A modified scale which over time evolved to be a venomous stinger, is their defense tool, which is filled by the toxin produced in glands near the bottom of the ray’s spine.
These are shed and replaced every 6-12 months.
Just like sharks, a stingray’s skeleton is made of cartilage, not bones & they have live births.
We have two young friendly sibling freshwater stingrays at Petland in our massive tank and their names are Luke & Leia.