Interesting Facts Fishing

'Fun' Facts about fish ...?
Does anyone know any interesting information about fish in general or specific species? Thank you.
My Gran has a golfish who is 27 years! True, it's so old that has lost its color. It is a kind of fish called the penis fish, only males with the biggest penis reaches its mate, and after the persecution of other men after sex, as it has been exhausted, and bite his penis out for prevent further breeding again. It's true! http://en.wikipedia.org/wiki/Penis_fish
Facts of Fishing Tip - Shimano Core