The Jungle Call Shark Lagoon Walkthrough -

Use the Waterfall Drop. It’s risky, but it places you next to a large rock you can climb. Stand on the rock and scope out the lagoon with your binoculars first.

"The shark kills me right after grabbing the idol!" → Don’t surface immediately. Stay low, use the underwater cave’s side tunnel (right wall) to reach a hidden shortcut. the jungle call shark lagoon walkthrough

"The Jungle Call" appears to be a specific quest or area within a video game, likely Sea Dogs: To Each His Own (also known as Corsairs: To Each His Own Use the Waterfall Drop