First, rainbow: from Andrew Winnard on Facebook, a photo of a rainbow-lit Metro escalator in Stockholm.
Then, sharks: in my posting earlier today “Central Shark”, about Sharknado Week on the SyFy channel (Trailer Park Shark (2017) is just about to begin!).
Which led me to the Italian clothing company Paul & Shark, with its sharky logo — and its line of rainbow shark t-shirts. And to a slew of artworks depicting rainbow sharks. And to a popular aquarium fish, the rainbow shark.