The move has been prompted by the stepped-up illegal efforts to catch crab that the poachers supply to Japan, South Korea and China, according to the Russian Border-Guard Service.

Two Cambodian trawlers were detained in the Russian waters near Sakhalin Island last Friday.

Russian border-guards let back into the sea more than two tons of live crabs from one of the trawlers.

A total of 500 tons of fish and crab has been returned to the sea from poaching ships near Sakhalin since early this year.

Voice of Russia, TASS

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