Reference: Cantor M, Whitehead H, Gero S, Rendell L. ‘Cultural turnover among Galapagos sperm whales’ Proceedings of the Royal Society B. Data are provided in the form of comma separated values files (csv): (1) Cantor_etal_Fig2_EncRate.csv: Data for plot in Figure 2 (30-by-3 matrix). Column 1 = Year; Column 2 = Encounter rates of sperm whales off the Galapagos Islands (calculated as number of groups of female and immature whales encountered divided by the total hours of acoustic and visual search (i.e. total effort minus time following whales)); Column 3 = Standard Error of the Mean for encounter rates (calculated as [Squareroot(number of encounters)/total hours of sampling effort], assuming Poisson distribution). (2) Cantor_etal_Fig3a_mat.csv: Data for dendrogram in Figure 3a (79-by-79 matrix). Square similarity of coda repertoires of groups of sperm whales photo-identified together across the Pacific (multivariate similarity of codas of the same click length using the Euclidean distance between their inter-click interval vectors, with basal similarity of b=0.001; equation and full details in Supplementary Material). (3) Cantor_etal_Fig3a_mat_labels.csv: Supplementary information for Fig3a_mat.csv file (79-by-2 matrix): group and clan labels for the similarity matrix, in the same order of appearance. Column 1 = Labels for groups of sperm whales photo-identified together (see main text for definition of groups); Column 2 = Vocal clan labels (1=Regular,2=Plus-One,3=WCaribbean,4=Tonga,5=Short,6=FourPlus) (4) Cantor_etal_Fig3b_table.csv: Data for table in Figure 3b (27-by-79 matrix). Rows denote coda types, Columns denote coda repertoires of groups of whales photo identified together. Cell values contain relative frequency of coda types (i.e. count of each coda type divided per total in each group). Column 1 = coda type label; Row 1 = group label for whales photo identified together. Analysis MATLAB code is available from the authors on request. Any additional queries should be directed to the corresponding author Mauricio Cantor The release of this data does not exempt those who reuse the data from following community norms for scholarly communication, in particular from citation of the original data authors, the citation of the original paper above and the citation of the Dryad repository for this data set.