Aquatic Arts 1 Live Electric Blue Crayfish/Freshwater Lobster (2+ Inch Young Adult) Caution should be exercised when keeping large crayfish. The general rule with crayfish is: if it can catch it, it WILL try to eat it! This crayfish will breed with a mate in home freshwater aquariums! They ship as 2 inch long young adult that will grow up to 5 to 6 inches long. As with all of our crayfish, the coloration of the electric blue crayfish is EXTREMELY high quality - much higher quality than others on the market! This crayfish may TEMPORARILY change color after molting, which may occur during shipping. If your crayfish is not blue and you find a molt in the bag or in your aquarium, do not worry; this is normal and the bright color will return in 2 weeks or less. All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!