Complex sentence: Blood parrots are often bright orange in coloration, but there are other colors that they can have naturally such as red or yellow, but other colors may be produced by dyeing the fish, which can shorten life expectancy.
Split into simpler sentences: Blood parrots are often bright orange in coloration, but there are other colors that they can have naturally, such as red or yellow. Other colors may be produced by dyeing the fish, which can shorten life expectancy.