Amazing Facts About Freshwater Fish I like to read about marine
fish. I also enjoying watching shows like Dicovery Channel's The
Blue Planet series. That TV series in particular provided an
amazing looking into the world of freshwater fish. Each book and
show seems to have a few interesting tidbits of trivia that I've
collected into this article. I think some of these facts really
are amazing. Male Goldfish have an unusual trick that they use
as part of their courtship display: they swim up to a female and
then roll over and urinate over her nostrils. As strange as this
seems, it allows the female to assess many things, including the
male's genetic make-up, thus preventing her from breeding with a
relative. Parental Firemouth Cichlids can also recognize their
own fry; remarkably, they will kidnap the fry of others and put
these on the edge of their own school of offspring so that they,
and not their own young, are in harm's way -- a kind of "cichlid
shield." The age at which fish can be considered old varies