Urchins

How many babies do purple sea urchins have?
Sea urchins typically spawn near the surface. Males release sperm into floating plankton, then female urchins release between eight and 20 million egg...
What do sea urchin mostly do?
Sea urchins (/ˈɜːrtʃɪnz/) are spiny, globular echinoderms in the class Echinoidea. ... Sea urchins move slowly, crawling with tube feet, and also prop...
Is an urchin considered an animal?
Sea urchins are animals that are typically small, spiny and round. They live in all the earth's oceans, at depths ranging from the tide line to 15,000...
What is the sea urchins family?
Sea urchins are in the Echinodermata phylum. The scientific name is Echinoidia, which is also the name of their class. They are in the Camarodonta ord...
Is the purple sea urchin a vertebrae?
Share. Pacific purple sea urchins are easily identifiable on the ocean floor because of their distinctive purple color. They are covered in pincers, t...
Is the purple sea urchin an invertebrae?
The purple sea urchin (scientific name: Strongylocentrotus purpuratus) lives along the coast of North America in the Pacific Ocean and are quite a uni...
How often does a sea urchin need to eat?
How much do sea urchins eat?How long does it take for a sea urchin to eat kelp?What do sea urchins need to survive?What can I feed my aquarium sea ur...
Does a sea urchin have any special adaptations for getting it's food?
Like a porcupine's quills, sea urchins count on their long spines to deter hungry predators from making them a snack. ... Every other section has hole...
How many spines does a sea urchin have?
Splendid spines: There are little knobs all over the outside of the test. The spines move on these little knobs, articulating somewhat like the ball-a...