S.O.S. Mess! by Davy Ocean

In the third book of a Shark School series spin-off, young hammerhead shark Harvey Hammer saves his friend from being turtle-napped! Harvey asks his best buddy Flash the turtle to join him on a family vacation to the Safari Park to see leggy-airbreathers (humans). But when Harvey and Flash get bored and wander off too close to the rock pools, Flash is turtle-napped by the leggy-airbreathers! Will Harvey be able to save his pal, or is Flash destined to become someone's pet—or worse, a bowl of soup?