Dense sponge grounds on Langseth Ridge (IMAGE) Max Planck Institute for Marine Microbiology Caption The dense sponge grounds discovered on the northerly Langseth Ridge seamount structure represent an astonishingly rich ecosystem, demonstrating the ability of sponges and associated microorganisms to exploit a variety of refractory food sources including fossil seep detritus. Credit Alfred-Wegener-Institut / PS101 AWI OFOS system Usage Restrictions Only to be used in the context of this publication and citing the right copyright. 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.