Green Brittle Stars Showing Different 'Pumping' Movement Patterns (video) Hokkaido University Share Print E-Mail Loading video... Caption A green brittle star with five arms and another with six arms showing different "pumping" movement patterns. Credit Wakita D. et al., Scientific Reports. June 5, 2019 Usage Restrictions This video is copyrighted and can be used for reporting this research work without obtaining permission if credited properly. Share Print E-Mail 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.