DIVING GLOSSARY · Ocean care
Reef
An underwater structure or raised area that may be formed by rock, coral or other material; not all reefs are coral reefs.
Explore the idea in context
Definitions are a starting point. These lessons connect the word to examples, illustrations and further reading.
Ocean care and next steps
Recognising marine habitats
Look at the setting as well as individual animals.
Read lesson →Ocean care and next steps
Corals are animals
Recognise coral as living animal life.
Read lesson →Introductory definition · Instructor review pending.