Lately people have been asking if there is any symbolism to the colors I give the characters in this series, but the answer is no. I simply color code them so people can quickly tell them apart and have started to use a wider range of colors for variety's sake because I got sick of pink and blue.
I completely adore this series! Nature is truly incredible, and contains so much more variety - in every sense - than most of us would ever guess. Your colorful characters are adorable: their little nuances of shape and gesture convey an impressive amount of personality (and a surprising amount of sexiness) for their minimalist design! I really like the subtle variations in color that you get from doing your coloring on paper: a digital color-fill just wouldn't be the same.
As a zoologist, I like this series. It's humurous and informative, and makes people think "what the hell?" Ever think of drawing bower birds? Or maybe clown fish where after breeding the male cares for the eggs and after the young hatch turns into a female and takes over the anemone waiting for another male to come along. There are actually several species of fish where one gender can change into another (male turning female or vise-versa). Just a thought.
Orange males are like the ultra dominant males who often have huge harems of females of any color and they defend a large territory. Yellow Males don't defend any territory, but hang around the edges of an Orange Males place and mate with his females when Orange guy isn't around. Blue Males defend very small territories and protect only one female of any color. Orange Females are very territorial and hostile towards other females and lay a lot of very small eggs. and lastly Yellow Females are a lot more tolerant of other females and lay larger fewer eggs.