Either black or red.
You do not tell if it is a boy or a girl by looking at it's color, the color changing green means the lizard is happy and if it is brown it means it is stressed.
If it is turned a lighter color, it usually means the fish is stressed out for some reason.
it means its stressed
I know that red means scared and black means stressed but that's pretty much all I know sorry
tenso
Each color change of the Mustache mood ring means something. The following list explains each of the colors, black means stressed, red means fearful, yellow means nervous, a light green ring means that you have mixed emotions, blue is relaxing, purple is calm, and dark green means romance.
It means that the animal is stressed and wants you to back of.
A female betta (fighter fish) may get vertical stripes at breeding time, and horizontal ones if they are stressed. Fading colours usually means illness or water quality issue
Suffering form nerves usually means you are stressed
they eat, sleep, drink, and change color due to temperature, environment, or if they are being stressed
It may be sick or stressed out. If it sheds then that might cause stress
it means you have not enough calcium lately