Size Comparison: Coin and Red rock crab

On this page you compare the exact size of Coin with that of Red rock crab (also known as Sally lightfoot crab, Grapsus grapsus) true to scale.

How big is Red rock crab?

Learn the true proportions and dimensions. Here, Red rock crab reaches a size of approx. 7.87 in. With our interactive tool you can place Red rock crab directly next to Coin to get a perfect feel for the actual size.

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