What are the Volcanic islands in coral sea?

1. Willis Islands group: Includes North Islet, South Islet, and Southwest Islet.

2. Chesterfield Islands group: Consists of approximately 23 coral reefs and islets scattered within a large lagoon. Notable islands include Bampton Reef, Chesterfield Reef, Entrecasteaux Reef, and Investigator Group.

3. Cato Island: A sand/rock island with vegetation.

4. Frederick Reefs: Comprises two coral reefs about 75 km apart: Frederick North Reef and Frederick South Reef.

5. Middleton and Elizabeth Reefs: Located in the northwestern Coral Sea. Middleton Reef is a submerged atoll, while Elizabeth Reef has emerged islands including Bird Islet and the Northwest Islet.

6. Coringa-Herald Islets: Two small rocky islets situated within the southern section of the Coral Sea.

7. Osprey Reef: A coral reef and sand cay located southeast of Willis Islands; known for bird nesting sites.

8. Saumarez Reefs: Three reefs form this group: Northwest Saumarez Reef, Centre Saumarez Reef, and Southeast Saumarez Reef.

9. Tregosse Islets: Comprised of two islets –Tregosse East Islet and Tregosse West Islet (also known as Wreck Islet).

Please note that these are some of the notable volcanic islands and reefs in the Coral Sea, and there may be smaller islets or seamounts within the region as well.