Dwarf Caiman info:
http://www.flmnh.ufl.edu/natsci/herp...s/csp_ppal.htm

http://www.whozoo.org/Intro2000/ashm...warfcaiman.htm

http://centralpets.com/pages/critter.../LZD5855.shtml

Croc care FAQ - these are pretty good:
http://www.crocodilian.com/crocfaq/faq-1.html
http://www.crocodilian.com/crocfaq/faq-2.html

I'm guessing 5 ft. would be a BIG dwarf Caiman. In this species the male is larger than female (unlike most snakes) and males are said to reach about four and a half feet.