- The puffer fish is a slow swimmer in a sea of bigger, faster predators. When chased by a large, hungry fish, a puffer rapidly inflates its stomach. This doubles its size and makes its spines stick out. The display warns off most all but the most determined hunters. Any creature that does try a bite will find it hard to close its jaws around a tough-skinned, spiny sphere.
Inflation works for the puffer fish. Writers of learning content often assume this approach will work for them too. They
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