Coral reefs cover less than 1% of the ocean floor but are home to about 25% of all marine species — they are sometimes called the rainforests of the sea. Corals are actually animals, not plants: each individual coral is a tiny polyp that builds a hard calcium carbonate skeleton around itself. The brilliant colors of coral come from microscopic algae called zooxanthellae that live inside the coral tissue and produce food through photosynthesis.
Coloring ideas: this picture is a wonderful opportunity to use your full range of colors. Try purple and pink for the branching corals, orange for the tube sponges, and tan for the brain coral. Color each of the three fish a completely different color scheme — yellow and black stripes, blue and white, and red and yellow for a vivid reef.
For younger kids, pick just one fish or one large coral shape to focus on at a time. Older kids will love the challenge of filling in every different shape in the reef — try to use at least eight different colors to reflect the true richness of a real coral reef.
