An Underwater Ecosystem Made of Calcium Carbonate
This page is the CodyCross answer for the clue below from Toys, Group 1836, Puzzle 1 (Electric Piano).
Question is: An Underwater Ecosystem Made of Calcium Carbonate
and the answer is: CORALREEF
Word Meaning:
CORAL REEF — A reef formed by compacted coral skeletons
Definitions from Wiktionary.