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What is a sea urchins defence?
its sharp spines
What unusual about the spines of sea urchins?
they are venomous
Is sea urchin a fish?
No, sea urchins are not fish. They are marine animals belonging to the phylum Echinodermata, whereas fish belong to the animal kingdom Chordata. Sea urchins have a hard outer shell made of calcium carbonate and are more closely related to starfish and sand dollars than to fish.
Can sea urchins shoot their spines?
Sea urchins do NOT shoot there spines. They can simply let them pop out (sort of like a porcupine). Most people make this mistake... neither a porcupine or sea urchin SHOOT there spines. They do harden and stick out farther but they DO NOT SHOOT THEM!
Are the Sea Urchins a type of chemical weathering?
No. Not even close. Sea urchins are small, herbiverous marine invertebrates with spines.
How sea urchins protect themselves?
A sea urchin's body is covered in sharp spines.
How are sea anemone and a sea urchin different?
sea anemones have stinging tentacles, and sea urchins have spines.
Do sea urchins have spines?
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.
What adaptations do sea urchins need to survive?
they have spines that react to predators
What does sea urchins use their spines for?
Mostly for protection and also for locomotion.
How do sea otters eat sea urchins?
Sea Otters find sea urchins on the ocean floor and break it open with a rock. It will then eat everything except the spines (the insides).
Do sea urchins die if they are not in the water?
While sea urchins are slow and non-aggressive, they do have spines for a reason. Some sea urchins possess venomous spines, sharp enough to pierce through a diving suit. This venom can cause muscle spasms, faintness, difficulty breathing and death.
