this is a very hard answer all i can say is that it is white information by(Doctor B.Raftery)
peacock
All of them are colourful but after seeing pictures i would say the Mandarin fish.
The formation of a 'Moon-bow' is exactly the same of your conventional rainbow. The light 'from' the Moon passes through water molecules in the air.
Camelion
Not necessarily. As trichromats, human color vision is better than most, and we're not particularly "colorful".
maratus volans(peacock spider)
more colorful, most colorful
I'd have to say tropical birds.
It's either a peacock or a parrot you decide
Most Koi carp are colourful
To attract animal/insects to them.
The most colourful colour you can see is white, because your eyes will be absorbing all parts of the visible colour spectrum. White consists of the most colours, so it is the most colourful. Alternatively, it could be argued that black is the most colourful, because mixing multiple colours of paint yields a very dark sample of paint. This phenomenon is actually known as subtractive colour, because each colour of paint is really "subtracting" the other colours from what is being reflected. For this reason, even though many colours of paint mixed together produce black, they are actually producing the least colourful light, and white is still the most colourful.