1 Live Zebra Crayfish/Freshwater Lobster (Cherax peknyi) - 3-4 inch Young Adult by Aquatic Arts This is a popular variant from the Cherax classification that has absolutely stunning, high quality coloration! Ships as 3 to 4 inch long adults - already of breeding age. Grows up to 6 to 8 inches long - one of the largest invertebrates we have to offer! This is a unique variety of crayfish that is the result of a cross between other color variants. All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!