What kind of fish change colors?

Answer 1

Goldfish do not change gender whatsoever.

There are fish that do, such as a clown fish (Nemo); they are all males from birth, and when it becomes breeding season, they pair off and one becomes female. How they decide that is unknown (and perhaps a great argument?!)
No they can not. but if you are trying to breed them i suggest you buy more gold fish, make sure that the females do not over populate the males or they will fight amounst themselfs and also make sure there is a plant or fake plant for them to lay their eggs in. Once the eggs hatch you might want to move the baby goldies out so that the other fish dont eat them. Also dont over crowd your goldfish they will certainly not breed if over crowded i suggest putting them in a filtered tank say 20 gallons? Good luck!

Answer 2

In short, no. Platys don't change sex, but there are two times in their lives when they can confuse their owners in this regard. All platys are born looking female - if you have a look at some newly born fry, all of them will have the triangular anal fin of the female. As they get to about 1/3 adult size, some of them will start to show that they are males by developing the gonopodium (male-shaped anal fin.) If the tank is overcrowded or they are underfed, this might be delayed until they are almost full-sized. This is more noticeable with mollies and swordtails than with platys; sometimes these fish can appear female until they are over a year old, if they are in the same tank as a dominant male. When separated from the dominant male, they suddenly develop male characteristics.

The other time when they can get confusing is very old females. Sometimes an old female will stop producing fry and may even develop a gonopodium. She has not actually changed sex; she is now sterile and will not show male sexual behavior or father fry. This happens to some females but not others, and again is more common in swordtails.

Answer 3

Yes. It is easy to spot the differences in some species while others it's next to impossible to tell one from the other.

Answer 4

Cichlids are one type of fish that change color depending on their environment. Saltwater Fish in general are known to change color.

Answer 5

clownfish and saLmon

Answer 6

Yes a male and a female fish

Answer 7

bettas can not change gender

Answer 8

Magikarp