Found some old pictures of my European crayfish or Astacus astacus. I had these guys 3 years ago. Pretty cool animals. I got them from local supermarket in Kiev. They were sold as food, to be boiled and eaten. But how can eat such cool decapods? I mean, look at their sweet faces.
It took them about 2 days to fully get used to my tank. After that, they became really bold and aggressive. They would eat anything I threw in there. I mean anything, veggies, mean, shrimp, pellets. They even caught most of the fish and ate them as well. After about a year, they have doubled in size and even started to wave their little claws at me in order to scare me off. I released the into a local pond because I wanted to keep more fish (at the time I only had one tank). Don't worry they were in contact only with local native fish.