are black and white clowns natural?
Yes and so is Picasso and some snowflakes originally but, of course, most of them are now capture bred.
Most designer color morph genes are not "unhealthy", but they are un-natural if you look deeper into their natural selection process.
1)The un-healthy traits that presents in the market are usually because of inbred and malnutrition during rearing. This is frequent in the regular patterned/colored tank bred fish too. In fact, I attribute this factor more to the issue of unhealthy looking fish surfacing the market to malnutrition than inbred because inbred is kept much lower by some commercial breeders. Fish health is almost inherent to early stage of any tank bred fish unless breeders are willing to swap their fish more and the technique of rearing is improved quick enough. If you have raised Discuss long enough , you would know the nutrition issues in the forms/shape of a discus. Different batch of babies can have very different forms because of a short period of mis-feeding. Currently, most tank bred Discus maintain a very original forms because the breeders have enough knowledge of their nutrition requirements. Clownfish breeding is still not mature, so lets hope, we learn how to grow them better. As long as one less fish is picked up from the wild, I think we should look more into the tank bred fish. This goes to all other tank bred fish ventures also. If not, why would the Aquarist of the Year goes an entrepreneur of fish breeding?
2)One major reason why you do not see the designer type looking pattern in the wild is that they are picked off by pred
ators first. Predators could be a bigger fish, a human being, and even the same bred of fish. If you have a batch of babies and one of them is different looking, it usually will be chased by the majority patterned/colored population until it is stressed to death. This could still happened to the minority color morphed one that is actually born the biggest and strongest amount them. The majority colored/patterned population will also singled out the minority letting it to go without a mate in the rest of the life span in the wild thus lowering the chance of the minority color to flourish. Predators also picked the minority colored/patterned one first, most likely because they are more eye catching in a whole bunch of the similar fish. It's concluded by many aquarists and marine scientists that female wrasses are more than male wrasse, first, because they stay female until one decided to change to male but secondly, the males are more likely to be picked by a predator both due to the flamboyant colors and the bolder behavior that they swimming on top of the female swan and is the one "singling itself out" to be eaten.
Price structure is a supply demand issue.