Good point, but I think (could be wrong) that none of this algae grow well in very polluted waters. Most red and brown ones live typically in cold, rocky areas

Good point, but I think (could be wrong) that none of this algae grow well in very polluted waters. Most red and brown ones live typically in cold, rocky areas and well oxygenated waters. Its quality may vary a lot if they are picked fresh or after being dettached by storms etc. Salicornia is more related with Quinoa or cacti than with algae. Crithmum is a carrot's cousin from cliffs. none of these are seaweeds.