Islands of the unexpected

Fish including bluefin trevally (Caranx melampygus), swarm over a shipwreck that is covered in elephant ear sponge, Solomon Islands.

Solomon Islands — Fish including bluefin trevally (Caranx melampygus), swarm over a shipwreck that is covered in elephant ear sponge, Solomon Islands. — Image by © Steve Jones/Stocktrek Images/Corbis