The wonderful thing about life as a biologist is that every individual — not just people or cats or dogs or horses — but all living things, even trees, are unique. Every being is unique. It’s just a fact. And certainly with fish, like birds, they all have a distinctive appearance and if you’re sharp enough to distinguish one from another you soon begin to see that they behave differently. If that’s personality, which I guess it is, each one has its own little quirks. For example, some fish are more aggressive, some are shy. And it’s wonderful spending thousands of hours under the ocean getting to know not just “the grand suite” or the kaleidoscope of life out there, but also to recognize all the individual pieces.
Sylvia Earle 2014