so full post would be
trying to get a definitive answer on I.D. of some of these plecs must be nigh on impossible
until you know the distinguishing features that set one from the other, teeth, scaling. buccal flaps, fin shapes, number of fin rays, colouration, patterning, adult size, clouration changes in fish during its development, potential stress colouration, locational varieties, variation in water quality, current vs filtration, and the very possibility that it made it to NZ as unidentified species and is therefore a good price for the importer, we are just conjecturing as to what it may be