Sea urchins can lose their spines due to various environmental factors, predation, or stress. When threatened or disturbed, they may shed spines as a defense mechanism to escape predators or adapt to changing conditions. Additionally, poor water quality or disease can weaken their spines, leading to loss. This process is a natural part of their Biology, allowing them to survive in challenging environments.
its sharp spines
they are venomous
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!
No. Not even close. Sea urchins are small, herbiverous marine invertebrates with spines.
A sea urchin's body is covered in sharp spines.
sea anemones have stinging tentacles, and sea urchins have spines.
Mostly for protection and also for locomotion.
they have spines that react to predators
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.
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).
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.
Sea urchins are covered almost entirely with spines, except for the bottom of their body.