2006-11-23 17:37:27 · 4 answers · asked by skippy 1 in Science & Mathematics ➔ Earth Sciences & Geology
Calcium Carbonate ..
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http://www.mbmp.org/corals.htm
2006-11-23 19:38:22 · answer #1 · answered by Geo06 5 · 3⤊ 0⤋
Coral skeletons are the coral that you buy in gift shops and the like; that is the skeleton. When living, the coral is an exoskelton - on the outside - and the living part is inside, with feelers and mouths poking out from tiny holes in the coral that it can retract into when threatened.
2006-11-23 17:46:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The coral skeleton is made of calcium salts, primarily calcium carbonate, just like the shells of marine mollusks.
2006-11-23 18:06:22 · answer #3 · answered by PaulCyp 7 · 1⤊ 0⤋
Calcium carbonate.
http://en.wikipedia.org/wiki/Coral
2006-11-23 17:45:46 · answer #4 · answered by Anonymous · 1⤊ 0⤋