This site contains information about Smooth hammerhead shark.
Of the hammerhead sharks, the smooth hammerhead is the species most tolerant of temperate water, and occurs worldwide to higher latitudes than any other species. In the Atlantic, it occurs from Nova Scotia to the Virgin Islands and from Brazil to southern Argentina in the west, and from the British Isles to Côte d'Ivoire, including the Mediterranean Sea, in the east. In Northern Europe, there are only six confirmed records from the British Isles, all but one (at Banffshire) from the southern part of the archipelago and all but one (in 2004) from more than 100 years ago. The oft-repeated claim of a 1937 capture from the Kattegat (Denmark) is incorrect, as a photo from the incident has revealed that it was a basking shark. In the Indian Ocean, it is found off South Africa, India, and Sri Lanka. In the western Pacific, it occurs from the Gulf of Tonkin to southern Japan and Siberia, as well as off Australia and New Zealand. In the central and eastern Pacific, it occurs off the Hawaiian Islands, California, Panama, the Galapagos Islands, Ecuador, and Chile. This species is usually considered to be amphitemperate (absent from the tropics) in distribution, though there are rare reports from tropical waters such as in the Gulf of Mannar off India, and off southern Mozambique. Its presence in the tropics is difficult to determine due to confusion with other hammerhead species. Although generally preferring subtropical and warm temperate regions, a study of captures in the West Atlantic and Gulf of Mexico off the United States recorded smooth hammerheads in water temperatures ranging from 7. 5 to 27. 5 °C (45. 5–81. 5 °F).