Help the Dolphin Find the Coral Reef — Level 3

Fifty-five changes of direction across 75 squares: this route almost never runs straight, and that is what makes it hard rather than its length. A child who is comfortable on a long, open level 3 sheet can still come unstuck here.

Coral reefs look like rock but are built by tiny animals called coral polyps, and they shelter a huge number of fish. Dolphins find their way partly by echolocation, clicking and listening for the echoes. Ask your child how a dolphin might hear a dead end before swimming into it. This route almost never runs straight, which is what makes it hard.

There is exactly one way through: no loops, and no square cut off from the rest.