Great White Shark

The great white shark is the largest known predatory fish, belonging to the family Lachnostreidae (mackerel sharks). It ranges through temperate and subtropical seas nearly worldwide, from South Africa and Australia to California and the Mediterranean. As an apex predator, it plays an important regulatory role in marine food webs. The species is listed as Vulnerable due to historic overfishing, bycatch, and slow reproductive rates, and it now receives protection in many countries. Great whites are famous for occasional spectacular breaching attacks near seal colonies and for long-distance transoceanic migrations tracked by satellite tagging, revealing a far more mobile and wide-ranging life history than once believed.

• Torpedo-shaped body with a conical, pointed snout
• Sharp countershading: slate-gray to bronze above, white below
• Large first dorsal fin set well forward on the body
• Crescent-shaped (lunate) caudal fin for sustained fast swimming
• Large triangular, serrated teeth
• Black, disc-like eyes

Adults typically reach 4-6 m, with some females exceeding this. The abrupt line between dark dorsal and white ventral coloring, combined with the black-tipped underside of the pectoral fins, distinguishes it from similarly sized mako or salmon sharks, which lack the sharp color demarcation.

Great white sharks inhabit cool to temperate coastal and continental-shelf waters, though they also cross open ocean basins during migrations. They are most frequently encountered near seal and sea lion colonies, rocky reefs, and continental shelf edges in regions such as South Africa, southern Australia, California, and the Mediterranean. Depth range spans from the surf zone down to over 1,000 m, and satellite tracking shows extended offshore excursions to mid-water depths. Preferred water temperatures generally fall between about 12-24 degrees C, and individuals often follow seasonal prey movements, congregating near pinniped rookeries in cooler months and dispersing into open ocean at other times.

Great whites are solitary hunters that rely on stealth and bursts of speed, often ambushing seals and sea lions from below. Juveniles feed more on fish and rays before transitioning to marine mammals as adults. They are ovoviviparous, giving birth to a small number of well-developed pups after a long gestation, with no parental care afterward. Individuals undertake extensive migrations, sometimes crossing entire ocean basins and returning to the same coastal aggregation sites in successive years. Loose size- and sex-based hierarchies appear at feeding sites, with larger individuals gaining priority access to carcasses. As apex predators, they help maintain balance in marine ecosystems by regulating populations of pinnipeds and other mid-level predators.