Since this weed yearly hits almost all the coasts in the region many have been looking for ways to use it. For instance as animal fodder, compost or biogas/fuel. Unfortunately sargassum contains accumulated arsenic substances and other nasty stuff. It is also very salty. On Bonaire we experimented with sargassum compost to grow tomatoes, spinach and warmoes. Sadly the plants took up the toxins and were thus not suitable for consumption. Research continues on Bonaire and in the region. For now the highest priority is to keep sargassum from damaging the most vulnerable parts of the island.
Also, do not try this at home. This maniac did not really eat it 🙂
Source: Mangrove Maniacs – Bonaire Lac restoration project – 21/03/2022