Xenopus Frogs (IMAGE) University of California - Berkeley Caption This is X. laevis flanked by its smaller cousin, X. tropicalis. Credit Atsushi Suzuki, Hiroshima University Usage Restrictions None 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.