Otters, a lovely animal figure, used to have a close relationship with humans. Otter fishing is a fishing technique which utilizes trained otters to fish in river. It has been practiced since the 6th century and is still practiced in southern Bangladesh. The otters have helped thousands of fishermen to subsist in this region, but this rare tradition is in danger as rivers are polluted and the fish population is declining. Otters are also in danger because of the degradation of mangrove by aquaculture, the contamination of river by pesticides and reduced popular interest in otter-raising.
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