Starfish (also called sea stars) are really
interesting animals. They have those tube feet
that can stick to things. They can put their
stomach inside out inside a clam shell. What
they can’t do is regulate their salt and water
balance. If the salinity changes too much, they
have to leave or die.
They can’t regulate their body temperature
either, except by their behavior. They can
move to a warmer or cooler place. If they’re too
cold, they can’t move very fast. If they get
too hot, they eventually die.
Sea stars also have to stay wet. They can
curl in their feet and slow down the drying-out
process for a while, but they need to stay near
water. That’s okay because their prey are in water
The movement of the water can push them around if
it’s really strong, but their tube feet are good
at gripping the rocks, so small waves probably
don’t bother them much.
What kind of senses do you think sea stars
have to have to keep themselves out of trouble?
You may want to study marine biology.
Thanks for asking,