Actually D Dot, endlers average about 23 days, guppies average about 28 days and are often crossed with endlers to form hybrids that nobody tells you are hybrids. I find it as dishonest as calling a pet shop molly a sphenops or mexicana. A pet shop molly may be beautiful, just like a hybrid endler can be, but it is not a pure anything species. It is a highly developed and intentionally bred hybrid that looks spectacular but please don't call it what it is not.