little is known about the whale sharks movement behavior but what is know is, Their movement has been attributed by some researchers to timing with plankton blooms and changes in water temperature.
They tend to spend most of their daytime hours cruising at shallow depths, apparently feeding, sometimes right at the water surface. During night time and when they are swimming over distances they tend to go deep and have been recorded to 3215 ft , the maximum depth the instrumentation used could measure.
It has no eyelid or protective membrane. If the shark perceives the possibility of injury to an eye, the eyeball is rotated backward into the eye cavity and is covered by a flap of skin that slides forward over the opening.