Rainbow? Close to seawater

A day in Oban with various appointments which turned out well and a haircut for John, he ventured into a barber shop, Turkish, and came out with the shortest hair cut since the early sixties. As a child his dad insisted both boys had short hair, sounds like a crew cut.  I think John rebelled at some stage and today was his first visit to a barber since then.  In recent years visits to a hairdresser have taken place, he fancied trying a barber shop today, much cheaper as it turns out at £10.00. 

As the ferry turned into Craignure this evening we all spotted these rainbow like colours lying above the water on the Sound of Mull, it looked beautiful. Your thoughts?