qT=2&tQ=A coral reef is made of one giant invertebrate.&tC=True|False&cC=2&fB=Coral reefs are made of the exoskeletons (outer shell) of many tiny invertebrates called polyps, which are related to jellyfish. These reefs provide essential habitats for more than one fourth of all marine animals, including fish, anemones, crustaceans, and sponges.<br><br>Coral reefs also benefit humans by protecting shore-side communities from strong waves and storms. Unfortunately, run-off from farms, roads, and ocean-side construction destroys these delicate reef ecosystems.