KUALA LUMPUR, Sept 12 — The Indian mackerel, also known locally as ikan kembung, is one of the most beloved fish of Malaysians. The stout, torpedo-shaped fish is so popular it has earned the nickname ikan rakyat, meaning “fish of the people.” ...

Cameroon’s coastal waters have been invaded by three of the world’s most dangerous water weeds, proving an existential threat to aquatic ecosystems and livelihoods of riparian communities. The latest of these weeds, Salvinia molesta, is a free-floating, green-brown freshwater fern with branching ...