"Rosy Boas have long been known for their unique localities and natural phenotypes but in recent years many unusual and attractive captive bred varieties have become available. These varieties show a phenotypic expression unlike the wild type animals and are known in the hobbyist world as morphs.There are two categories of morphs that can affect snakes; those that affect coloration and those that affect pattern. In Rosy Boas both types have been established. The popularity of these morphs in the herpetoculture industry is ever increasing due to the fact that various morphs can be combined to make designer morphs. Designer morphs are morphs that have a combination of two or more genetic traits. The probability of such crossing occurring in the wild is so small that for all intents and purposes designer morphs exist only as creations in the world of herpetoculture. When a new designer morph is created it is one of a kind, often increasing its monetary value. This type of selective breeding has become extremely popular in the reptile hobbyist world as breeders mix and match genes in an effort to create unique, rare and beautiful animals."