Fishy intruders from two oceans

A vessel exiting the Panama Canal, one of the world’s most important shipping routes. A multibillion-dollar expansion helped the Panama Canal accommodate king-size cargo ships but it might also be fuelling ecological upheaval. — ©2025 The New York Times Company

NIGHT fell as two scientists began their work, unfurling long nets off the side of their boat.

The jungle erupted in its evening symphony: the sweet chittering of insects, the distant bellowing of monkeys, and the occasional screech of a kite. Crocodiles lounged in the shallows, their eyes glinting whenever headlamps swept their way.