I used to have a pet crayfish I snagged while fishing & brought home from the Fraser. He was awesome. I also had a blue lobster (yabby/australian crayfish) and the differences between the two were amazing. The fraser crayfish was like a dinosaur, poop brown, fully armored and somehow primitive looking compared to the delicate and more slender blue yabby. They would eat everything in my 30 gal tank they could get their claws on. Alas, I came home one day to find the yabby eating the brains of the fraser crayfish, a common end when crayfish fight. Circle of life, awesome stuff.