Moon Jellies are found all over the world in a range of temperatures. The Moon Jellies we provide prefer water in a range of 75 - 79 degrees Fahrenheit.
Jellyfish Art offers Moon Jellyfish (Aurelia aurita), which do not sting.
which is 48.2-66.2 degrees Ftheir optimum temperature range is between 9 degrees C and 19 degrees C.
http://www.jellyfishfacts.net/aurelia-auritax.html says which is 48.2-66.2 degrees F