thankssylvia said:They are considered guppies as they have been bred from a long line of 'guppies' wich are simply selectively bred for the special tales. However, many of the 'fancy' tail varieties of this type (swords etc) were actualy first introduced into the guppy by hybridising with endler's. So, in a sense, it is a hybrid guppy X endler's but you would consider it a pure guppy regardless of the fact that it may possibly (and almost certainly) has endler's ancsestry somewhere along the way.