4 metres

Average size This oceanic shark is sometimes found close inshore when the continental shelf is narrow. In temperate seas it may approach the surface where it can be observed by divers and fishermen, but in tropical waters it tends to seek deeper water with cooler temperatures in its preferred range of 12–20 degrees centigrade Although they prefer to stay at depth, blue sharks can be attracted to the surface with bait. It may sometimes take hours of waiting patiently before they arrive, but when they do, they will normally stay around the boat for hours and investigate divers very closely. Great places to encounter this species are South Africa, Mexico, Rhode Island, California and the Azores Islands