have you had the pleco for 13-14 years?
I have him since around 2006-2007. It started with "he'll keep the glass clean" at the fish store. He wasn't bigger than 2 inches.
He has lived in a community tank with goldfish, convicts, guppies and lots of other things... yeah...I know... not my idea, we found a fish tank in the trash and bought the cheapest fish available in the store. My father was a fan of aquariums when he was 5 and applied knowledge from that era... we had the internet, but didn't knew how to use it.
Blue is around 10 or so. I don't remember the exact date when I got him, but can trace back.
The pleco recognizes me and "greets" me (ignores rest of ppl).
Same with Blue. When he sees me, he stares and flashes reddish on his sides (not much visible, camera does not pick up).
Not sure if it's cuz he hates my guts or something, but we have that kind of relationship xD
My pleco also has a "cancer thing" growing on his sucker, which I cut off on a 1-6 monthly basis.
It seems it's painful for him to eat with it (he looses weight if it overgrows).
This is why I don't re-home the pleco regardless of not having the proper tank size.
Nobody is going to do surgery on a fish and he'll probably starve to death.
Also, it's been too long, I just can't. I'm efficient with the water changes by now xD