Global Distribution of Shark Species
Most shark species live in coastal and offshore waters, with the highest diversity in warm temperate and tropical oceans. The Atlantic, Pacific, and Indian Oceans together host the majority of known species, according to the latest assessments from major marine research organizations and biodiversity databases FishBase.
Sharks are found from shallow coral reefs to deep ocean basins, with some species restricted to narrow ranges and others migrating across entire ocean basins. Coastal shelves and seamounts often support dense populations because of abundant prey, while open-ocean species follow temperature and productivity gradients across international waters IUCN Red List.
Regions with the Highest Shark Abundance
Areas such as the waters off the eastern United States, southern Africa, and parts of the western Pacific consistently rank among the most species-rich and abundant shark habitats. These regions combine productive continental shelves, strong currents, and protected areas that support large populations of both coastal and pelagic sharks.
Marine protected areas and shark sanctuaries, especially in the Pacific and Indian Oceans, have helped stabilize local populations by restricting fishing and improving enforcement. Satellite tracking and fishery-independent surveys show that these zones often host higher shark densities than adjacent unprotected waters NOAA Fisheries.
Key Factors Shaping Shark Habitats
Temperature, oxygen levels, prey availability, and ocean currents are the primary drivers of where most sharks concentrate. Species distribution models based on the newest survey data highlight strong links between sea-surface temperature and the presence of large coastal sharks, while deep-sea species are tied to bathymetric features and low-oxygen zones.
Fisheries pressure, habitat loss, and climate-driven shifts in prey fields are reshaping traditional hotspots. The latest global assessments show that regions with strong monitoring, science-based catch limits, and international cooperation tend to retain more intact shark communities than regions with weak management FAO Fisheries.