Coral grows by expanding its skeleton of calcium carbonate. Polyps secrete this hard shell-like substance, which forms the branching forms of the coral reef. The skeleton serves as protection from predators and the elements for the polyps. When stressed, they will retract into the skeleton, and they will extend from it to feed.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC