<i>Daphnia lumholtzi</i> (IMAGE) Pensoft Publishers Caption This picture shows Daphnia lumholtzi displaying a unique ability to form spectacular helmets and tail spines to defend themselves when exposed to fish (left individual), but not in the absence of fish (right individual). Credit Christian Laforsch Usage Restrictions CC-BY 3.0 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.