Sawfish, a family of cartilaginous fishes consisting of five species, were recently identified as the most vulnerable of all elasmobranch families. Ecologically extinct throughout most of their ranges due to overexploitation, notably through the expanded use of gillnets, sawfish are now on the brink of extinction. We work with the Sawfish Conservation Society and the scientists in the US to contribute data to help assess population diversity and distribution throughout their remaining range.