| SARGASSOSEA | Area of the North Atlantic dense with gulfweed (8,3) |
| BAYOFBISCAY | Wide inlet of the North Atlantic south of the Celtic Sea, noted for its violent storms (3,2,6) |
| SARGASSO | The ... Sea is a calm area of the North Atlantic between the Azores and the Caribbean Sea (8) |
| EMERALDISLE | Gem of the North Atlantic |
| BERMUDA | ___ Triangle, mysterious area of the North Atlantic (7) |
| AWASH | An area of the North Sea covered with water! (5) |
| MIDWEST | Large area of the north-central USA (7) |
| FOREST | Area dense with trees |
| LOSER | Generally inept, I will be more dense with nowt up top |
| THIN | Become less dense, with "out" |
| LENDERS | Banks dense with left and right movement |
| IRISHSEA | Arm of the North Atlantic, location of Anglesey, the Isle of Man and Bardsey Island (5,3) |
| AZORES | Group of islands in the middle of the north Atlantic (6) |
| SEA | Part of the North Atlantic, lying between the West Indies and the Azores, notorious for its floating seaweed (8,3) |
| CRITICALLY | Status in 2020 of the North Atlantic Right Whale which is on the brink of extinction ... |
| ENDANGERED | Status in 2020 of the North Atlantic Right Whale which is on the brink of extinction ... |
| BISCAY | Bay of ___ , wide inlet of the North Atlantic Ocean indenting the western European coast (6) |
| FULMAR | Gull-like seabird of the North Atlantic and North Pacific (6) |
| SHARK | Alternative name for the porbeagle (Lamna nasus) of the North Atlantic (8,5) |
| MACKEREL | Alternative name for the porbeagle (Lamna nasus) of the North Atlantic (8,5) |
