Disposition of lubbock's wrasse?

[Delphinus]

Meant to say "has more colours" (subtle difference). The vibrancy of the colours is, I understand, something one can use to make a guess, but without a clear case of both onhand it's hard to know what to look for.

Nevertheless, this fish has been on its own for 5 months unchallenged, would that not make the likelihood of being male that much greater?

But then .. the fish is only 2.5" long.. if they don't reach sexual maturity until a larger size, then maybe heshe's simply not there yet?