Danio margaritatus of the celestial pearl danio, it was scientifically described and given the genus name "Celestichthys". In 2008, a more comprehensive study showed the celestial pearl danio was a member of the genus "Danio", with "Danio erythromicron" and "Danio choprae" as its closest relatives. The fish lives in small ponds created by seeping groundwater or overflow from small brooks or springs. Water temperature in January was rather low (22–24 °C), but as the habitat is very shallow, it would heat up quickly during hot spells, thus "D. margaritatus" is probably tolerant of temperatures above the low 20s. As in most water
What Is and What Should Never Be (Supernatural) What Is and What Should Never Be (Supernatural) "What Is and What Should Never Be" is the twentieth episode of the paranormal drama television series "Supernatural"s second season. It was first broadcast on May 3, 2007 on The CW. The narrative follows series protagonist Dean Winchester (Jensen Ackles) who finds himself in an alternate reality after a confrontation with a djinn . The creature appears to have fulfilled Dean's greatest wish: that his mother had not been killed when he was a child. Dean is happy in the new world until it becomes apparent that his previous work as a