هواپیما روی مار؟ دانشمندان گونه های مختلف خرچنگ را در حال سواری بر مارهای دریایی کشف کردند

Planes on a snake? Scientists discover various crab species hitching rides on sea snakes

Like all other snakes, sea snakes shed their skin as they grow. But because they live near the surface of the open ocean, they don't have the benefit of removing their old skin by slithering against a hard surface. Instead, they wriggle into a pretzel and use the friction generated by their scales to get the job done.