Topic
Reefs
2 questions tagged Reefs — spanning every one of the seven Ws.
how
How do parrotfish help make sandy beaches?
Parrotfish scrape algae off coral with beak-like teeth and grind up bits of reef rock. Much of the sand on tropical beaches can come from their digested coral material.
AnimalsReefs
how
How do coral reefs grow from tiny polyps?
Coral polyps build reefs by secreting calcium carbonate skeletons. Over time, many generations of polyps accumulate into large reef structures.
AnimalsReefs