A record for long term observation has occurred with Pam Birley of Lesteshiire England observing over a period of 7 years a certain harbour seal she named 6-spot because of the distinctive markings. Oddly enough she often gets an image of it from the remote camera 5 in the fall as it lies on the same flat rock near the Jetty. You can see some of her other observations of it at https://www.racerocks.ca/pam-birley-photo-records/
Pam sent the picture with the note: “Hi Garry, YES….it is 6-spot !!!! I got a good clear view this morning as it lay basking below Cam 5. Here is a picture. First seen 2008 I believe, that makes it seven years !!! I love it !!!! Pam