Fish kill still mystery as 250kg hauled out

More than 250 kilograms of dead fish had been taken out of waterways in Songjiang District by yesterday after nearby residents complained about the stink from the fish washing up on the river banks since last Monday.

Dead fish hauled out of waterways in Shanghai's Songjiang District. [File photo]

Nearly all the dead fish, mainly various types of carp, had been removed by yesterday, water authorities said, but the reason for the large fish kill was not yet known.

Samples of the dead fish were sent to the agricultural commission for tests to determine the cause of their deaths.

Some think the fish might have been drugged by illegal fishers, but no toxins had been found in the water.

The tests are still being done, authorities said.

Residents said floating dead fish were first found on April 1 and washed up in abundance along Sijing Pond and Dongjiang Harbor in the next few days.

An official with Songjiang Water Bureau, surnamed Gao, speculated the fish had been drugged because small fish died first, followed by the death of big fish in groups.

The small fish died earlier because they're more sensitive to toxins.

Gao declined to give his full name.

All the dead fish plucked out of the water were buried safely, agricultural authorities said.

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