WHY shouldn't we take a starfish out of the water? Starfish | Why?

WHY shouldn't we take a starfish out of the water?

Starfish pump in and out of water through their body surface. This way it breathes.

If you take a starfish out of the water, it will get air into its body, but once submerged, it won't be able to sink to the bottom and breathe normally. As a result, it will die an agonizing death.

You cannot pull a starfish out of the water for more than 3-5 seconds.