1 Live Thunderbolt Crayfish/Freshwater Lobster (Cherax pulcher - Bred from Pink Coral Crayfish) - 3-4 Inch Young Adult by Aquatic Arts Ships as 3 to 4 inch long young adults that are already of breeding age. Grows up to 6 to 8 inches long with colors greatly intensifying as the crayfish grows larger. This is one of the largest freshwater crayfish in the world at adult size, but it is less aggressive than P. Alleni (Electric Blue Crayfish). As many as 3 could be peacefully kept in a 55 gallon tank, but one is recommended if food is scarce. As with all of our crayfish, the coloration of the Thunderbolt crayfish is extremely high quality. All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!