I recently came across the following quote on the twitters, attributed to Albert Einstein:

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

I doubt that it's a genuine quote, but is the implied claim that all fish are incapable of climbing trees true?

Related question: Did Einstein say the "if you judge a fish" quote that many are attributing to him?