Related Clues:

• Atoll features
• Settings of many schools
• Leaves in a huff, with "out"
• Ridges just above or below the sea
• Divers' destinations
• Charges with anger
• Ball game delayers
• Greener fish regularly spotted in coral banks
• Underwater hazards
• Submerged coral ridges
• Nautical hazards mean one takes in sail
• Groups of submerged rock
• Ridges of coral
• Playing free, skinhead rocks
• Bunk overturned in Sergeant-Major's rages