C1574 Who Swam Faster than Anyone else

The lifeguard was so nervous that his face changed. He kept on reminding the people who were swimming in the sea. At the same time, his partner had already raised the warning symbol of sharks in the sea.

However, the two lifeguards had the same question in their minds while they were doing this in a hurry. Why could the shark swim so close to the shore?

As staff of the private beach club