The great white shark, or Carcharodon carcharias, is one of the ocean's most feared predators, known for its imposing size and power. Although this shark is not a resident of Quebec waters, it generates great interest among sport fishing enthusiasts and ichthyologists. Its global distribution includes the temperate and tropical waters of many oceans, but not the cold waters of Quebec. Sport fishermen often dream of catching this marine giant, although it is generally not targeted for fishing due to conservation and strict regulations surrounding it.

The great white shark is easily recognizable by its fusiform and robust body, designed for speed and power. Its color varies from gray to blue-gray on the back, with a white belly, providing it with perfect camouflage in deep waters. Its crescent-shaped mouth is lined with triangular, serrated teeth capable of slicing through the thick flesh of its prey. The pectoral fins are broad and pointed, while the caudal fin is crescent-shaped, optimized for rapid propulsion. Young white sharks exhibit more pronounced coloration and slightly different patterns compared to adults. Males can be identified by the presence of claspers, appendages used for reproduction.

The great white shark is absent from Quebec waters due to the temperatures being too cold. However, it is present in warmer coastal regions, such as those of the North Atlantic, including around some islands off the American and Canadian coasts. Its presence is more frequent in temperate and tropical waters where it can find an abundance of prey and optimal conditions for thermoregulation.

The great white shark prefers coastal waters and offshore areas where the temperature is moderate. It is often found near seal colonies, which are a significant part of its diet. Underwater structures such as reefs and continental shelves are favored locations for this predator, which uses these formations to ambush its prey. It can dive to great depths but generally prefers waters close to the surface, where it can regulate its body temperature more effectively.

The life cycle of the great white shark begins with viviparous birth, with the young already well-formed upon exiting their mother's womb. Juvenile growth is rapid during the first years, reaching several meters in a few years. Sexual maturity is reached between 12 and 15 years, after which they generally reproduce every two years. The life span of the great white shark can reach 30 to 40 years, or even more under optimal conditions. Spring → Rapid growth of young → Summer → Sexual maturity reached → Autumn → Reproduction → Winter → Monitoring of hunting areas

The great white shark is primarily solitary, although it may be observed in small groups while hunting or in food-rich areas. It is not particularly territorial and moves over long distances to follow the migrations of its prey. This shark is very sensitive to sounds and vibrations in the water, allowing it to detect the movements of its prey from a distance. Weather conditions can influence its activity, with sunny days often leading to increased surface activity.

The diet of the great white shark evolves with age. Young sharks primarily feed on fish and small sharks, while adults prefer marine mammals such as seals and sea lions. These fat-rich prey provide the energy necessary for their large size and active metabolism. Depending on the season, great white sharks may adapt their diet to include more fish or cephalopods, based on availability.

The great white shark is more active during the warm months when water temperatures are optimal for its metabolism. The best activity periods are often in the morning and late afternoon when prey is also active. Weather conditions, such as clear skies and stable atmospheric pressure, favor the observation of this shark at the surface. In winter, the shark migrates to warmer waters, reducing its visibility in colder regions.

Since the great white shark is not fished for sport, the choice of lures and colors is more relevant for study and observation. Natural baits, such as whole fish or pieces of meat, are often used to attract these sharks during sea observations. Bright colors or metallic reflections can simulate injured fish and attract the shark's attention.

For observation, robust underwater photography equipment is essential. A waterproof camera with a pressure-resistant housing is necessary to capture quality images. If you're using a boat, ensure it is equipped with appropriate safety devices, such as life jackets and sonar to locate sharks. For cage diving, complete diving gear, including a wetsuit, is essential to stay comfortable in colder waters.

Direct handling of the great white shark is strongly discouraged due to its size and power. For release, it is crucial to minimize stress and not to take the shark out of the water. Photography should be done from a distance, using appropriate equipment to avoid any danger to the photographer and the animal.

The great white shark, being at the top of the food chain, has virtually no natural predators once it reaches adulthood. Orcas may occasionally attack them, but these are rare cases. Young sharks may be vulnerable to other large sharks and orcas.

The great white shark is classified as vulnerable globally due to overfishing and habitat destruction. In Quebec, although it is not present, awareness of its protection is important for overall marine biodiversity. International regulations often prohibit the capture and trade of this species to preserve existing populations.