A short report generated by Martin Welker for the Belize Valley Archaeological Reconnaissance Project report of 2015. This short report details the analysis of animal bone recovered from Plaza B at Cahal Pech by Nancy Peniche May in excavations undertaken between 2011-2013. Please Cite as: Welker, M. H. 2016 Cahal Pech Plaza B: The Vertebrate Fauna. In The Belize Valley Archaeological Reconnaissance Project: A Report of the 2015 Field Season J. A. Hoggarth and Jaime J. Awe (eds.). Belize Institute of Archaeology, National Institute of Culture and History, Belmopan. Further information may be found in: Peniche May, N. 2016 Building Power: Political Dynamics in Cahal Pech, Belize during the Middle Preclassic. Ph.D. Dissertation, Department of Anthropology, University of California, San Diego.