Monday, August 3, 2026
Science

Why some water fleas suddenly grow helmets: Key receptors reveal how predator warnings trigger defense

Daphnia, commonly known as water fleas, are tiny crustaceans that live in freshwater ponds and lakes. When they sense predators in their surroundings, these small organisms can swiftly move away or adapt their body shape, for instance becoming rounder and forming large helmets or spines on their hea...

Why some water fleas suddenly grow helmets: Key receptors reveal how predator warnings trigger defense
Image: Phys.org
Daphnia, commonly known as water fleas, are tiny crustaceans that live in freshwater ponds and lakes. When they sense predators in their surroundings, these small organisms can swiftly move away or adapt their body shape, for instance becoming rounder and forming large helmets or spines on their head, neck or tail.

Originally published at Phys.org

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