They are not workers per se. If we are to treat them as people they are not proletariat but displaced indigenous people that live off of the fruits of the sea. Most humans that are on the sea are people that profit from the destruction of the environment or actively destroying the ecosystems themselves working for capitalist institutions of fishing, dredging or dumping. I don’t know if they have the know-how to identify human institutions, but they would be justified in waging war on capitalist humanity in human terms.