Related Clues:

• Lowlife?
• Pond scum
• Seaweed, e.g.
• Eukaryotic organism
• Aquarium annoyance
• Tiny aquatic plant
• Yogi's position
• Pond blossom
• Pond dweller
• Nonflowering plant
• Big name in computer software
• Sargassum, e.g.
• Brown seaweed
• Sea palm or badderlocks
• Simple water dweller