Related Clues:

• Morsel for a sea snail
• See 15-Down
• Snack for a surgeonfish
• NFL pass catcher Randy
• Lichen's kin
• Aquarium dweller
• Pond organism
• Green growth
• Aquatic organism
• Aquarium problem
• Pond plant
• Seaweed, for one
• Pond life
• Flowerless plant
• Pond growth