Sludge worms collected from the heavily polluted Mutha river are washed and dried and sold to aquariums. While worm collectors barely earn a day's living, aquariums sell these worms for Rs 4,000-5,000 a kg.

Sludge worms collected from the heavily polluted Mutha river are washed and dried and sold to aquariums. While worm collectors barely earn a day's living, aquariums sell these worms for Rs 4,000-5,000 a kg.

Sludge worms collected from the heavily polluted Mutha river are washed and dried and sold to aquariums. While worm collectors barely earn a day's living, aquariums sell these worms for Rs 4,000-5,000 a kg.

Sludge worms collected from the heavily polluted Mutha river are washed and dried and sold to aquariums. While worm collectors barely earn a day's living, aquariums sell these worms for Rs 4,000-5,000 a kg.