Here are some sentences.Sea urchins have spines.Have you ever seen a sea urchin?
Mostly for protection and also for locomotion.
Any animal need oxygen for respiration.
asexual reproduction
Sea urchins are not as popular a subject for laboratory experimentation as rats or fruit flies, however, they have been studied. Scientists like to study practically everything.
A lantern One if by land, and two if by sea
yes,they have stings or spikes,which they use to inject poison to their attackers.
Kina is a seafood delicacy in New zealand. commonly called sea urchins elsewhere i believe
Sea urchins have poisonous spikes so sea life find it very hard to eat them. But otters use rocks to crack them open and eat them also humans will gut the sea urchin and eat there insidesYou can find out by asking other people like your teacher, parents, friends, and brothers or sisters if you don't think this answer is right. the answer is otters, people, and heron.
So that the sea urchin can protect itself from is enemies, it also has venomous spines. They also use their spines to kill other sea ceatures, so they can eat them.
No. Sea urchins are animals, which eat algae. They use there spines to make sure no fish eat them, and their mouths are on the bottom of them. They move around on almost invisible legs.
Use a tinderbox on the lantern.