Coral Reef Ecosystems
📋 What it is
Coral reefs are built by tiny animals and burst with life — but are fragile and easily harmed.
🗣️ Coach says
A coral reef is built by tiny animals (coral polyps) whose stony skeletons pile up over centuries into vast structures. Reefs are the "rainforests of the sea" — home to a quarter of all marine species — but they’re fragile: warming water makes coral "bleach" and can kill whole reefs.
🧠 Memory hook
Reefs = built by tiny coral animals; "rainforests of the sea" (¼ of marine species). Fragile — warming bleaches them.
😂 Giggle
Why did the coral break up with the algae?
It felt the relationship was getting too symbiotic!
😲 Whoa!
The Great Barrier Reef is so large — over 2,000 km — that it’s the only living structure on Earth visible from space.
✅ Quick check: Why are coral reefs called the "rainforests of the sea"?
Say your answer out loud first — then reveal.
They’re incredibly biodiverse — home to about a quarter of all marine species despite their small area.
Reefs pack huge biodiversity, like rainforests.
🧪 Try it! (2 minutes)
Look at a coral-reef photo and count how many different creatures you can spot in one small patch.