Stingrays in the Amazon were stranded there by the Caribbean Sea

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River stingrays

There are 38 species of river stingray

Fernando Marques

The web of waterways draining out of tropical regions of South America is home to dozens of species of freshwater stingrays. The fish evolved from seagoing ancestors, but exactly how they got inland has always been unclear. Now it seems they were carried by the Caribbean Sea reaching deep into the continent millions of years ago.

Central and South America are home to about 20 per cent of the world’s total fish species, says João Pedro Fontenelle at the University of Toronto in Canada.

Intrigued by what could be …

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