dovii sex question

Crazy 8

Plecostomus
MFK Member
May 13, 2018
209
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Merica
Just a quick one you have more knowledge on them than me ... why does the black line come and go is it something to do with the mood of the fish
That’s what it seems like to me, when my male is getting aggressive at the front of the tank biting the glass his black line seems to disappear .
 
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