A dominant and a subordinate male cichlid (IMAGE) Frontiers Caption A dominant and a subordinate male cichlid (Astatotilapia burtoni). Image courtesy of Dr Alex Jordan, Behavioural Evolution Lab, Max Planck Institute of Animal Behaviour. Credit Dr Alex Jordan, Behavioural Evolution Lab, Max Planck Institute of Animal Behaviour Usage Restrictions Image owned and provided by Dr Alex Jordan, Behavioural Evolution Lab, Max Planck Institute of Animal Behaviour, and must be credited to him. License Original 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.