Related Clues:

• Laminaria, for one
• Seaweed you can eat
• Seaweed found in botanical garden
• Sea weeds
• Phycological unit
• Plant in an underwater forest
• Tiny organism that's often pluralized
• Seaweed one can eat
• Bit of pond vegetation
• Blue-green growth
• Plankton minutia
• Bio fuel source
• It may wash up onshore
• Morsel for a guppy
• Sea grass, e.g