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Discussion Starter · #1 ·
I got a Empire Gudgeon (hypseleotris compressa) juvenile pair six months ago. They have grown huge and healthy. However, the male has not developed any coloration. No red, just a boring brown.

My water parameters: temperature 75F (24C), PH 7.5, GH 285, KH 113,

My only explanation is that males color up only in the presence of another male, but that is just a guess.

Any experiences with them or hints?

Thanks in advance.
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