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what causes the black stripe in the silver angel's eyes to disappear

3K views 4 replies 3 participants last post by  onefish2fish 
#1 ·
I'm new to fish- like, very new. I know nothing at ALL about fish. But, I do have one question- I have an angelfish, and I've noticed that sometimes the black stripes through his eyes are not there- why is this?
 
#2 ·
My angel will sometimes turn off his stripes depending on his mood, sleeping, tank lights are off, etc.
 
#4 ·
Oops. I just noticed this was in the saltwater section. Is your angelfish fresh or salt? I have freshwater tanks.
 
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