A man holds Guppy fish in a plastic bag, used for eating mosquito larvae to control the spread of mosquito-borne viral diseases, in Kolkata on July 4, 2020.
DIBYANGSHU SARKAR, AFP VIA GETTY IMAGES
Guppy fish are an effective dengue mosquito control method. They are one of five most effective forms of dengue control, as these tiny fish can be placed in water vessels in and around homes, where they will eat the larvae of dengue-transmitting mosquitoes.
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