Hi, thanks for looking at my auction! 5 Dwarf Crayfish- cambarellus shufeldtii sp. - This are unsexed young crays at 3/4" and up. They are cute little crays very hardy and very fun to watch, they are 100% freshwater and will breed in the tank. A 10 gallons tank is OK to start a colony. The maximun size of the males is 1.5" and females are a bit smaller. You can feed them any kind of fish food, I give them pellets(algae,shrimp) and frozen blood worms. The temperature is better between 72 and 84 degrees fahrenheit. A planted tank is OK because they won't mess with your plants or the substrate. Shipping on USPS Priority is $10.00 and LIVE ARRIVAL IS GUARANTEED. Thanks! Patty