Related Clues:
- Ocean plant
- Film bit
- Green organism
- Unwanted organism in an aquarium
- Marine plant
- Lake plant
- Pool organism
- Part of many a snail's diet
- Stagnant water problem
- Gala class of seaweed
- Water plant
- Water plant with no stem or leaves
- Water plant for a gal
- Plant such as kelp
- How 17 across starts to have a twist to make it like seaweed