i have a funny gourami

Question
hi i have a weird gourami (not sure what type) that keeps on changing its light blue colour to a dark blue colour and im not sure why. I have him in a 28 gallon tank with
2 angels,
1 silver dollar,
1 giant danio,
2 long tailed danios,
1 red tailed shark,
a swordtail
and 2 ghost shrimp.

I've also noticed that he spends most of the time with the silver dollar and changes colour. and i used to have a yellow gourami in the tank but this gourami killed him for no reason. So ya i just thought it was weird.

Answer
They change color depending on the lighting, the time of day, and the feeding. Very normal.

Your danios and silver dollars shoudl be in groups of at least 6. This would overstock your tank however, so if you want them to live a full lifespan I would either get a bigger tank or find a different home for them. The danios may last awhile but the silver dollar will not.

-Nick