 there does seem to be evidence that they soak up toxins from the water and what that means is that of course all of those things concentrate as you go up the food chain so from a very self-interested point of view you know if we're eating a fish that's eaten four other fish and was eating plankton before that you've got a very concentrated form of these kind of plastics going into your body but i mean i agree about the tidal stuff as well i mean the tides