Related Clues:

• Green growth
• Aquatic organism
• Aquarium problem
• Pond plant
• Seaweed, for one
• Pond life
• Pond growth
• Primitive water plant
• Aquarium growths
• Bit of seafloor flora
• Tiny pond plant
• Seaweed
• Rootless life of the sea
• Kelp, e.g.
• Reef denizen