Paul;-
   That's a very fine answer about Sargassum and Red Tide. Is the red
algae poisonous to mollusks that injest it?  Again, is the sargassum
home to small shrimp and crabs? Does the sargassum itself act as a
buffer to waves and movement or does it just exist in this quiet zone?
 Are there other such zones in other oceans similar to this?
      Art