Jakarta (AFP) – Mounds of slimy carcasses pile up on a riverbank in Jakarta where authorities are fighting an uphill battle against a fast-breeding invasive fish flourishing in Java island’s heavily polluted waterways. The sapu-sapu, a sucking fish introduced from South America decades ago to keep Southeast Asian aquariums algae-free, has made a home in Javan rivers — many after being thrown out for outgrowing their tanks.

