The pacu, a fish with human-like teeth, is a close cousin of the piranha. It isn't quite clear how this predatory South American fish entered Indian waters but they're being found by fishermen in Andhra Pradesh. Are these aquatic immigrants destructive and capable of wrecking their ecological surroundings? Could they destroy the other fish around them?

This fascinating new episode of The Intersection investigates what exactly the pacu could mean for southern India.

This is the latest episode of The Intersection, a fortnightly podcast on Audiomatic. For more such podcasts visit