AnimalsCroatia
Sea urchin Fun facts for kids
Paracentrotus lividus
The sea urchin lives on rocky seabeds in the Mediterranean and eats seaweed and seagrass.
- Where it lives
- on rocky seabeds in the Mediterranean
- What it eats
- seaweed and seagrass
- How big it is
- about as big as a small apple
Fun facts about the sea urchin
The ones Sammy likes best. She tells them in the game, too.
A sea urchin has no head, no brain and no eyes, but it can feel light all over its body.
Its five teeth sharpen themselves and can grind a hole into solid rock, where it tucks itself in against the waves.
Sea urchins hold bits of shell, pebbles and seaweed on top of themselves, like a tiny sunshade or a disguise.
Each spine sits on a tiny joint, so it can swivel and point at whatever touches the urchin.
It walks on hundreds of stretchy little tube feet that are moved by water pushing inside them.
A baby sea urchin floats in the sea, looks like glass, and turns into a round urchin almost overnight.
If it gets flipped upside down, it slowly rolls itself back over using its feet and spines.
Riddle
Can a friend guess it?
Read the clues to someone, one at a time, without saying the animal. How many clues do they need? Fewer is better, just like in the game.
I live on rocky seabeds and spend my days hiding in little holes in the rock.
I have no head, no brain and no eyes, but I can feel light all over my body.
My five teeth sharpen themselves and can grind a hole into solid rock.
I walk on hundreds of tiny stretchy feet and sometimes carry pebbles on top like a sunshade.
I'm a round, dark purple ball of sharp spines, so wear beach shoes when you swim near me!
Sammy might be thinking of a sea urchin.
In Thought Zoo, Sammy picks an animal and you ask her yes-or-no questions to find it. You'll find the sea urchin in the Croatia adventure.
Play the CroatiaComing to iPad, iPhone and Android on 12 January 2027
