More rain and dismal murk in Mull today. Also lots of seaweed washed up on the beach. I had a notion about some of the red seaweeds, so brought some home for a wee test: behold the gorgeous orange fluorescence under 365nm UV light 🤩😊 #Ultraviolet #RedAlgae #Mull

I wonder what the algae might get from being fluorescent? 🤔