Do you know that a starfish has no brain but a complex nervous system. They regenerate from their body parts. And the important part is that, they can't live in fresh water.
When we talk about dolphins, they are smartest creature after Human beings. And the fun fact about them is that Dolphins sleep with one eye open.
Electric eels have as much energy saved in their body to glow up 12 bulbs. This energy is generally stored in their tails.
You know that Sea turtles usually excrete salt from the eyes. And they use these tears keeping them wet throughout their life.