DNA could only survive 10,000 years in Temperate environment Lindahl, T. 1993. (religion.blogs.cnn.com)
The Basal Metabolic Rate (BMR) Calculator estimates your basal metabolic rate — the amount of energy expended while at rest in a neutrally temperate environment, and in a post-absorptive state (meaning that the digestive system is inactive, which requires about 12 hours of fasting). (calculator.net)
They come from temperate environments, so they do not handle warm water temperatures well, especially when they are crowded together. (petbusiness.com)