butterfly rays, devil rays, and eagle rays. Although this dataset doesn't specifically account for the giant guitarfish population, the collected data can be utilized to infer the decline of giant guitarfishes considering they share the same distributions, habitat, and susceptibility to capture as the several species of myliobatid rays. Overall, the collected data is utilized to calculate proportional declines, annual change in population, and the reduction of the giant guitarfishes over the three generations of complementary data. One of the primary landings data for the "giant guitarfish" category are available from Iran including data ranging from 1997 to 2016. This specific dataset most likely includes all rhinids and glaucostegids occurring locally. From this dataset, it shows that the landings declined by sixty-six percent over the twenty years, which is approximately ninety-one percent of a population reduction over the last three generations of larger glaucostegid species. In addition to the data collected from Iran, Pakistan includes the landing data for the "rhinobatid" category spanning from 1993 to 2011, covering the country's two coastal provinces. Data from the Sindh province showed a seventy-two percent decrease from peak landings in 1999 to a low in 2011. In addition to the Sindh province, data showed an eighty-one percent decrease from landings in 1994 to a low in 2011 in the Balochistan province. These decreases are the equivalent of ninety-eight to ninety-nine percent population reduction over the last three generations of larger glaucostegid species. Although they're not the same species as the giant guitarfish, the catch data of the myliobatid rays in western India serves a crucial component when determining the guitarfish population decrease. The catch data of the myliobatid rays in western India was compiled from 1990 to 2004. The catch rate of the rays declined by approximately sixty-three percent during this time period. However, the fishing effort had doubled over this time, which would be the equivalent of a ninety-five percent population reduction over the three generations for glaucostegid species. In addition to the landings data compiled from western India, landings data of "guitarfishes" is available from Tamil Nadu, located in eastern India and the data was collected from 2002 to 2006. This compiled data is unique because it includes different species of guitarfish such as the giant guitarfish, clubnose guitarfish, sharpnose Guitarfish, and widenose guitarfish. Although this time period is too short to extract an equivalent population reduction over three generations, it