What are those weird red things in the water? Best description I can come up with is that they look like a fruit roll up or a piece of balloon or skin. Mostly smooth w/ irregular flat shape and minimal markings. Not very slimy and didn't sting. 
Someone told me they were algae, but since they had to think on what a "purple" flag meant I wanted a second opinion!

Someone told me they were algae, but since they had to think on what a "purple" flag meant I wanted a second opinion!
