While some scientists are wondering why starfish are disintegrating in mass die-offs in waters off British Columbia's coast, others are trying to understand how to control this invasive species.

This week's video, from the New York Times, shows how a starfish ingests its prey. A chemical in its body called a neuropeptide signals to the sea star's stomach to slide out of its mouth and consume the food.

Scientists believe they have found a counterpart chemical that retracts the stomach into the starfish's body — knowledge that could come in handy for controlling this sea creature's eating habits.

Interested in learning more? Watch for our story on how large-scale sea star deaths have changed the ocean floor, coming on Jan. 10.

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