| SKERRY | (Scottish) Reef or small rocky island (6) |
| FLUGGS | Small rocky island of the Shetlands; the location of Britain's northernmost lighthouse (6) |
| MUCKLE | Small rocky island of the Shetlands; the location of Britain's northernmost lighthouse (6) |
| WRASSE | A beautiful often brightly coloured percoid fish of coral reefs or tropical waters, yet its name, from Cornish or Welsh, means "old woman" or "hag" (6) |
| KNOTTY | Troublesome (as reef or sheepshank?) (6) |
| AILSACRAIG | A small rocky island in the Firth of Clyde opposite the town of Girvan |
| SKERRIES | Skies covering, er, right small rocky islands (8) |
| LAGOON | An area of water separated from the sea by coral reefs or earth or sand banks (6) |
| PEBBLE | Little rocky? |
| GRANNYKNOT | What we tied before we joined the Scouts or Guides and learned the sheet bend, reef or bowline (6,4) |
| ATOLL | A ring-shaped reef or island formed of coral (5) |
| ASTEROID | Small rocky object orbiting the sun - store aid (anag) (8) |
| ASTEROIDS | Small rocky objects that move around the sun |
| KERRY | Rocky island exporting small breed of cattle |
| AGROUND | On to or on a shore, reef, or the bottom of a body of water (7) |
| SCAR | A crag, low reef or sunken rock; a limestone cliff; or, a cicatrice (4) |
| KNOT | Bowline, reef or figure-of-eight |
| FREEFORM | Irregular sampling of reef or mudflat |
| BIOME | Coral reef or coniferous forest |
| SPIT | Reef or sandbank projecting into the sea (4) |
