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A foreign species called the “knife fish” is posing a threat to the local fishing industry at the country’s largest lake. The knife-shaped fish are multiplying in Laguna Lake where it is displacing native species. The fish, which can measure about 51 centimeters was bred as an ornamental species for aquariums but somehow got into the lake. Fishermen’s groups complain their catches of native fish are shrinking. In previous years, the suckermouth catfish, known locally as “janitor fish”, was introduced to local waters by ornamental fish breeders, where it displaced native species and damaged nets.
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