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Known as rockweed or bladder wrack, this species of seaweed is in the Fucaceae family of brown algae. "Fructifying Tip of a Frond of Rockweed (Fucus vesiculosus). a, a, air-bladders; b, b, conceptacles." -Whitney, 1911

Fructifying Tip of a Frond of Rockweed

Known as rockweed or bladder wrack, this species of seaweed is in the Fucaceae family of brown algae.…