We didn't have a lot of time, but we noticed that some of the barnacles had an unusual purple coloration between their plates:
For the record, here's a close-up (see below). We're not sure if the purple had actually been incorporated into the plates, or if there was an internal structure with that color that was strong enough to show through the plates. Do you have ideas about what could cause this coloration?
I don't know if they have responded to the warmer water during the past year, but there have been impressive numbers of pelagic gooseneck barnacles on objects washing ashore during the past month.