"Ari's dad is a Marine Biologist and has invited Ari, Zeke and Jez to a trip out to sea to track dolphins for his research. Ari and his friends are totally stoked, but there is something lurking deep beneath the water that might derail the entire day. Before they know it, Ari must find a way to save his dad and friends from danger without becoming prey himself"--Provided by publisher.
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