Hi. I've asked this question before but I didn't really understand so I'll ask again. On this page, there is a picture of what appears to be a red eft in an aquarium with a tail fin. Look at the first photo in the link. Does anybody know what's going on here?
http://www.fcps.edu/islandcreekes/ecology/eastern_newt.htm
http://www.fcps.edu/islandcreekes/ecology/eastern_newt.htm