Coral is the hard, often colourful structure built by tiny marine animals, or those animals themselves, forming reefs in warm seas. An anemone is a soft-bodied marine animal with stinging tentacles that is often mistaken for a plant — or, on land, a flowering plant such as the windflower. Memory hook: coral is hard and builds reefs, anemone is soft and waves its tentacles.
The core difference
Coral is a hard, reef-building marine structure or organism, while anemone (in its marine sense) is a soft-bodied, tentacled animal, and on land names a flowering plant.
- coral — a hard structure built by tiny marine animals that forms reefs: Divers explored the coral reef teeming with fish.
- anemone — a soft-bodied marine animal with stinging tentacles, often mistaken for a plant: The clownfish darted safely between the tentacles of the anemone.
- anemone — also a flowering plant of the buttercup family: Wood anemones carpet the forest floor in early spring.
How to tell them apart
Both words come up together because they share a reef habitat, but coral and anemones are different kinds of animal. Coral colonies build the hard, stony structure of a reef over time, while sea anemones are soft-bodied creatures that anchor to rocks or reefs and use their stinging tentacles to catch food, as clownfish famously rely on for shelter.
To add to the confusion, anemone also names a land flower in the buttercup family, sometimes called a windflower. If the context is a garden border, it is the flower; if it is a reef or rock pool, it is the animal.
