There are a few times as a diver where you know a site so well you can expect to see not just certain species but certain individuals. Turtles, as we have seen, are a good example but reef fish tend to be less so because they are not so individualistic in their patterning and behaviour. If one wanted to recognise one individual it would help if it turned, for example, fluorescent yellow:
This is the same individual I posted about in February and is the only one of this morph I've seen here. He's picked up a few war wounds since then as you can see below but nevertheless was in fine fettle last week following us for some way and then seeing off an encroaching red-headed morph coney from his territory.