Our understanding of the biology and ecology of sharks and other highly mobile sh species relies largely on sherydependent data from commercial and recreational sheries (Myers and Worm, 2003; Oliver et al., 2015). Catches made by net, hook and line, trawl, or trapping can provide valuable information, especially when biological samples are required (Jaiteh et al., 2014; Santana-Garcon et al., 2014a). However, these methods are often harmful and can result in direct mortality at capture or cryptic mortality after release. Ethically, invasive sampling techniques are becoming less acceptable with growing concerns over the status of some threatened, endangered, and protected species (e.g., sawsharks).