A fisherman holds up a chambo — what locals call a type of tilapia native to Lake Malawi. Chambo is one of Malawi’s most popular fish. Once it was plentiful, but now it is listed as “critically endangered” because of overfishing.

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A fisherman holds up a chambo — what locals call a type of tilapia native to Lake Malawi. Chambo is one of Malawi’s most popular fish. Once it was plentiful, but now it is listed as “critically endangered” because of overfishin