Why do crocodiles spin rapidly in the water while holding large prey?

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Illustration of an estuarine or saltwater crocodile (Crocodylus porosus) with its mouth open, showing scaly skin and powerful limbs, alongside a scale bar for size reference. — crocodile Estuarine, or saltwater, crocodile (*Crocodylus porosus*), found in brackish waters from Sri Lanka, India, Bangladesh, and Myanmar east to the Solomon Islands and Vanuatu and south to Australia.

When a crocodile captures large prey, it performs a rapid rotation in the water—a behavior often referred to as a "death roll"—to tear the victim into smaller, more manageable portions. Because crocodiles lack the specialized teeth required for chewing or cutting food into bite-sized pieces, this spinning motion is a necessary mechanical adaptation that allows them to dismember their prey.1