I hear that rummour too but I also hear that they are quite numerous now but it is just that they have got quite good at avoiding colection making it a less atractive option for colectors. Dunno if iether rummour is fact or not.
Very dangerous to dive the site I hear and they are very popular and the more yellow ones go for a premium.
I understand wild caught are available now and again at some importers but weather they are as yellow as you remember check out the photo for yourself taken at a importer/dealer local to me.
(The more yellow ones may be picked out of a shipment I guess before they reach the shops and go to prefered customers or to be bred by the dealer) The photos in the Aqualog book on Tropheus look very similar (or duller/less yellow) and were taken before the year 2000.
Dunno but I hear rummours or remember something about em being bred lakeside but why would that make em less yellow? Anyone with any sense would breed mainly and select for the desirable colour surely?
All the best James
PS to be honest I do not understand why they are so sort after. They never seemed any better coloured than many other cheaper types to me. Though I have seen some old published photos eg
Adult male, Photo: Ad Konings
where I do not believe the colours are real (or at least in the years I have seen them (since the early 1990s (I can not remember the first import date exactly)), I have not seen one even aproching this colouration), which may go some way to explain the lust for em.