red eyed tetra has lost its red eyes

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tylixxa

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got five red eyed tetras over the weekend. i am sure they all had the red markings above their eyes. tonight i noticed one doenst have that anymore. anyone got any ideas? does the color come and go?
 
The intensity of colour is often an indcation of a fishes mood or stress level. When happy and unstressed, fish show their best colour. If they are not happy, they are less vivid and in some cases, can display entirely different markings. Since the fish are newly installed, I'd leave it a while, they will take time to settle. Of course, I am assuming you have checked your water parameters and there are no problems there.
 

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