Counting and subtraction alongside hands-on elements immerse readers in this fun-filled underwater world featuring best pals Nugget and Fang. Who will win the race around the reef? "It's Reef Day!" said Fang. "I can't wait to compete in the race around the reef." "That sounds swim-tastic!" said Nugget. "Count me in!" With sweet humor and simple math, Nugget and Fang race two tuna, a clown fish, and each other...