Ok, so I have not posted in a while.. a lot going on!
I snuck a new critter into the fish tank and this one is a silly, little, animated, and BLUE monster. So I named him Grover. Here he is being fearsome:

Grover is also up to some antics. I transferred one of the Lilly plants from the frog tank into the big tank. A few hours later he had dug it up and was riding around on it as it floated at the top of the tank!

According to http://www.bluecrayfish.com/ there are MANY species of blue Crayfish and apparently they can even be white.