So assuming no one has actually heard answers from aquatic creatures, how do we know that fluoridation cannot be seen by fish? Why is some fluoridation clear versus pink? Is clear less visible than pink fluorocarbon? What is the purpose of "fluoridation-coated" if the line core is not invisible to fish? Is Berkeley Vanish really 100% fluorocarbon when it is only a small fraction of the cost of fluorocarbon leader?