Related Clues:
- Ocean obstruction
- Home to Nemo, in "Finding Nemo"
- One can get free from this knot
- Shallow water obstacle
- Pink hue named for a sea creature
- Marine polyps, often forming reefs
- William Herschel used a microscope to show that this marine animal is not a plant
- Atolls, essentially
- Submerged threat
- 22 across will be aware of free travel
- Seaside souvenir
- Britpop band with "Glow" album
- Great Barrier ___
- ___ reef: warm, shallow salt-water area
- Coral feature