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Male Jawfish

Focusing on the task at hand, a male jawfish in Indonesia's Lembeh Strait protects his brood of eggs by incubating them in his mouth. Incubation takes anywhere from seven to ten days, during which time the adult fish may occasionally "toss" the egg mass out of his mouth and take it in again. Researchers believe this may be a way to aerate the eggs and change their position in their caretaker's mouth.

Photograph by David Doubilet