In Australia, "flake" is a term used to describe the flesh of several species of shark, particularly the gummy shark). It has a mild flavor, a soft texture that remains well-defined after cooking, and a clean white appearance. Flake has no bones because sharks are cartilaginous, making it a popular type of fish to be served in Australian fish and chip shops). However, there have been concerns about the mislabeling of flake, with some fish and chip shops selling endangered and imported shark species labeled as "flake". The primary shark species sold as flake is the gummy shark, but several others are also sold as flake, including the school shark, elephant fish, whiskery shark, Australian blacktip shark, sawshark, and various dog sharks). During the late 1960s, it became apparent that larger individuals of several shark species were contaminated with high levels of heavy metals, particularly mercury, and a public outcry eventually led to a ban on the sale of large school sharks in 1972, which remained in effect until 1985). In Britain, nursehound is often sold as flake).