Ocean survival? But my vehicle is a turtle

When I woke up, the world had turned upside down. Every human being had been transported to another world, where survival meant navigating the open sea. The ocean stretched endlessly, offering both danger and opportunity. Other survivors had assault boats, luxury yachts, or at worst, pirate ships or ghost ships. But her mode of transport? A giant turtle. Li Li stared at the smooth shell beneath her feet—less than a square meter of space—and felt like crying. She was terrified that the turtle might suddenly decide to dive deep, which would be the end of her. Fortunately, her turtle was remarkably intelligent. It understood her words and could navigate on its own, covering a hundred kilometers for just one fish. While others shivered in storms and went hungry, unable to find food, Li Li stood on the back of her turtle, which had evolved into a basalt, and lived her life in comfort. When someone tried to form a team to steal her resources, they were swallowed whole by a single great mouth, never even catching a glimpse of her face.