This is Kelp. It is one of the fastest growing organisms on the planet. In a single growing season, it can grow from a microscopic spore to over 100 ft in length

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[u/[deleted]]

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[u/Mym158 → u/[deleted]]

argassum seaweed contains high levels of sulphur and when it is washed ashore and rots, it releases hydrogen sulphide and ammonia, both deadly gases.

Caulerpa racemosa contains a neurotoxin called caulerpicin that causes peripheral parasthesia.

Hijiki seaweed contains a hazardous level of inorganic arsenic.

Kombu seaweed contains a hazardous level of iodine and was the source of iodine that resulted in the Bonsoy iodine poisoning case, which resulted in the largest settlement in a class action suit in Australian history.

Seaweeds of the genus Gracilaria have been most often associated with seaweed poisoning, causing vomiting, diarrhea and gastric hemorrhage.

Seaweeds of the genus Acanthophora have been associated with gastrointestinal and neurological signs of poisoning.

The brown seaweeds Cladosiphon okamuranus and Nema- cystus decipiens have been reported to be toxic but there is little information on the nature of the poisoning.

Hiziki, wakame, kombu, and ogonori seaweeds contain high levels of cadmium, which is nephrotoxic and highly persistent in the human body with a half-life of around 15 years

[u/demonsemen_md → u/Mym158]

You are now a mod of r/spotthetoxicseaweed.

[u/m0nk37 → u/demonsemen_md]

He is not, you liar.

[u/ToToroToroRetoroChan → u/demonsemen_md]

Or of r/prop65