bumble bees or psedo crabro's can change to the all blck color at will. My large female changes to all black within seconds and stays that way for long periods of time.
VENT IT. put the fish in a clear plastic bag and hold it up over you head and look at the vents to determine male or female. oo or oO m/f
i have never vented any fish.
can you tell me what it supposed to look like if its a male or is it just oo?
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