Answer:

KELP

Answer	Crossword Clue
KELP	Iodine source
KELP	Large brown seaweed
KELP	Seaweed variety

KELP	Water bed?
KELP	Ingredient in some smoothies
KELP	Edible marine plant
KELP	Sea palm, e.g.
KELP	Large seaweed
KELP	Ocean algae
KELP	Brown seaweed
KELP	Badderlocks, for one

KELP	Food for sea urchins
KELP	Oceanic flora
KELP	Source of the food thickener alginate
KELP	Laminaria, for one
KELP	Plant in an underwater forest
KELP	Seaweed
KELP	Iodine-rich food from the sea
KELP	Sushi ingredient

KELP	Potash source
KELP	Sea urchin's chow
KELP	Sushi wrap
KELP	Japanese soup base
KELP	Undersea vegetation
KELP	Source of iodine
KELP	Edible seaweed
KELP	Large algae

KELP	Underwater growth
KELP	Marine greenery
KELP	Vegetation in underwater forests
KELP	It can grow 1.5 feet per day
KELP	Cold-water seaweed
KELP	It may wash up onshore
KELP	Kind of seaweed
KELP	Type of seaweed

KELP	Sort of seaweed
KELP	Useful seaweed
KELP	Seaweed that surrounds sushi
KELP	Vitamin K source
KELP	Marine vegetation