Jellyfish. They have 4 hearts and no brain.
A cat is an animal.
The brain is 80% water
yes.
starfish
Jellyfish
water does effect your brain
Totally depends on the animal, (a dog's brain is so very much larger than a fly's)
all of them, the brain is inside the skull
Starfish have five arms and no brain.
the less healthy the brain
you dont have a brain..
That would probably depend on what the brain is from. Animal, Human?