The green sea turtle is an herbivore and feeds primarily on seagrass and macroalgae. Two toxins which are suspected to be associated with FP are found epiphytically on these plants. First, the toxic compound lyngbyatoxin from the cyanobacterium Lyngbya majuscule, and second the toxin okadaic acid – a documented tumour-promoting toxin - from the dinoflagellate "Prorocentrum". Again, causality has not been concluded, but an association seems to exist between the distribution of especially the dinoflagellates and the occurrence of FP, and as they are found on weeds, they can be ingested by foraging green sea turtles.