if there are two numbers, it means (# of males) . (# of females) so if I say I have 1.3 pastels, I have one male and three female pastels.
If there are three numbers, it means (# of males) . (# of females) . (# of unsexed animals) so if I say for instance I have 3.6.2 tarantulas, then I'm saying I have three males, six females, and two that I don't know the sex of.