Approximately how many species of sharks are known?

More than 500 shark species are known. The total changes as scientists describe new species and revise classifications, but “over 500” is the standard broad answer for the number of living sharks recognized today.

Sharks are not a single uniform type of predator. The group includes tiny deep-sea lanternsharks, powerful open-ocean makos, bottom-dwelling carpet sharks, filter-feeding whale sharks, and many reef and coastal species. They are distributed across multiple orders and families, reflecting a long evolutionary history and enormous ecological variety.

Shark-like cartilaginous fishes appeared hundreds of millions of years ago, while the modern shark lineage is generally traced to the Mesozoic Era. Counts can differ between references because some lists include undescribed species or treat populations as separate species. That is why the quiz uses an approximate category rather than an exact total. “Over 1,000” is too high for currently recognized shark species, while lower options omit a large number of documented species.