Frozen seaweed salad is also called Hiyashi wakame. Its main ingredient is wakame peduncle. Wakame is grown in clean sea area. China, Japan and Korea are main plant bases.
Most edible seaweeds are marine algae whereas most freshwater algae are toxic. Some marine algae contain acids that irritate the digestion canal, while some others can have a laxative and electrolyte-balancing effect.Most marine macroalgae are nontoxic in normal quantities, but members of the genus Lyngbya are potentially lethal. Typically
is caused by eating fish which have fed on Lyngbya or on other fish which have done so.This is called ciguatura poisoning.Some species of Desmarestia are highly acidic, with vacuoles of sulfuric acid that can cause severe gastrointestinal problems.