By Fishmosy (Dr. Benjamin Mos) and Northboy Habitat and Water Conditions Riffles are so named because they are found in riffles, shallow fast flowing sections of creeks. They occur in easterly flowing creeks from Northern Queensland down to Victoria, Australia. Two famous collecting areas are the Atherton Tablelands in QLD and Never Never Creek, near Bellingen NSW. Riffles can grow to over 6cm, reports of 8cm is not uncommon. However, these shrimp change sex at around 3.5-4cm from