Amazing video footage shows the moment an injured lemon shark appears to ask a diver for help.
The wounded creature repeatedly nudged Joshua Eccles from Florida, who checked him over and noticed a huge rusty hook lodged in its flesh.
Gently holding the shark, Joshua managed to free the hook from its belly. Amazingly, in the tender scene captured by a friend, the shark then comes back as if to say thank you.
Experts said afterwards that Joshua's actions may have saved the shark from suffering a deadly infection.