While some species (Goldfish etc) have been selectively bred by aquarists for their colour the majority of fish have colours to help them stay alive or find a mate in some way. In some species it makes them stand out because they are poisonous and their colours stop other creatures from attacking them. This preserves the lives of both the potential hunter and the hunted. All fish need to hide for one reason or another and camouflage is a main reason for most colours.
The beautifully colored parrot fish is known to change its shape, color, and even gender during its life.
in a colored candle there is wax
Gold? Silver? Copper? Gold colored, silver colored, copper colored.
Hot wires in home are normally colored black. And ground wires in computers are normally colored black as well.
the colored part of the eye is called the IRIS
Coral reefs are home to many brilliant-colored fish.
the lizard fish is tan / sand colored
yes because a fish in a thing.
The stone fish for the most part is like a flesh colored fish.
angelfish
the golden fish found in ponds is a golden orf
fish mean fertility
opah
No! That would be gross. It is just flavored, colored, gelatin.
bream
Although I'm not sure what you mean by "deep" body, Betta fish, or Siamese Fighting Fish, or Rumble Fish (if you're S.E. Hinton) are thin, brightly-colored (domestically bred males tend to be more colorful), and have long, wavy fins.
The beautifully colored parrot fish is known to change its shape, color, and even gender during its life.