Don't know if this will help - but there are a few characteristics that separate the subspecies, which might help you figure out what he is.

The ventrals on a moquardi will have black blotches as does friesi, whereas taeniurus are a cream/grey.

The pattern on moquardi starts 3-4 head lengths, friesi - 1-2 head lengths and taeniurus - 2-3 head lengths

All three spp above have a black tongue edged with blue.

If it was a yunnanensis cross then tongue may lack the blue edging and be reddish black.

Sue x
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