Mounds of slimey 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.
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