design: Genomic DNA was extracted following a standard phenol-chloroform extraction approach (Sambrook et al. 1989) or with the DNeasy Blood & Tissue Kit (QIAGEN N.V., Venlo, The Netherlands), including an over-night incubation step. In the following, DNA was fragmented via sonication with a M220 Focused-ultrasonicator (Covaris, LLC, Woburn, USA) to a target peak length of 350 bp and libraries were prepared using the NEBNext Ultra II DNA Library Prep Kit for Illumina (New England Biolabs, Inc., Ipswich, USA) and 8 nucleotide long NEBNext Multiplex Oligos for Illumina (New England Biolabs, Inc., Ipswich, USA) with 530 ng as a starting amount. Library quality and quantity was checked on an Agilent Tape Station 4150 (Agilent Technologies, Inc., Santa Clara, USA). Three target gene capture reactions were performed according to manufacturers high sensitivity hybridization protocol v. 5.01, by pooling twelve individual per capture reaction and using equal starting amount of each individual library within each capture reaction (namely 500 ng, 400 ng, and 300 ng). The white shark samples were pooled in one single pool, while the individuals of the other species were randomly mixed between two pools, so that each reaction contained representatives of each of the six species. Hybridization and wash temperatures were 60 C to account for bait- and target sequence divergence, and hybridization was performed over 72 hours.