Sex

Staghorn corals and juvenile bluehead wrasse in the late afternoon sun at Coral Gardens reef off the coast of Belize—Photograph by Karl Wirth

Reef Refugia

In Belize, scientists are studying a thriving coral reef and helping to spread its resilience into other reefs around the Caribbean.

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Love Train

The Kangaroo Island echidna may seem bizarre, but the spiky mammal’s quirks have helped it survive cataclysmic change.

Beautiful Ugly

While the Asian sheepshead wrasse’s allure may be debatable, the fish’s color-changing, sex-changing abilities are hard to disregard.

Inconspicuous Battleground

Off the coast of South Australia, an unremarkable setting conceals one of the ocean’s most spectacular events—a mating spree for the world’s largest cuttlefish.