Whale Shark (Rhincodon typus): The whale shark holds the title for the largest fish species. It can reach lengths of up to 40 feet (12 meters) or more. Despite its enormous size, it is a gentle filter feeder and mainly feeds on plankton and small fish.
Basking Shark (Cetorhinus maximus): The basking shark is the second-largest fish, often growing up to 33 feet (10 meters) in length. It is a filter feeder, similar to the whale shark, and primarily consumes zooplankton.
Great White Shark (Carcharodon carcharias): Although not the largest fish, the great white shark is the most famous shark species. It can grow up to around 20 feet (6 meters) in length and is known for its formidable predatory abilities.
Beluga Sturgeon (Huso huso): Beluga sturgeon is the largest species of sturgeon and can reach lengths of up to 18 feet (5.5 meters) and weigh over a ton. These fish are known for their prized caviar.
Arapaima (Arapaima gigas): The arapaima is a massive freshwater fish found in the Amazon Basin. It can grow up to around 10 feet (3 meters) in length and weigh over 400 pounds (180 kilograms).
Mekong Giant Catfish (Pangasianodon gigas): The Mekong giant catfish is one of the largest freshwater fish in the world. It can reach lengths of up to 10 feet (3 meters) and weigh over 600 pounds (270 kilograms).
Giant Grouper (Epinephelus lanceolatus): The giant grouper is a large predatory fish found in the tropical and subtropical waters of the Indo-Pacific region. It can grow up to around 8 feet (2.5 meters) in length and weigh over 600 pounds (270 kilograms).
Swordfish (Xiphias gladius): Swordfish are known for their long bills or "swords." They can reach lengths of up to 14 feet (4.3 meters) and are popular among anglers due to their impressive size and fighting ability.
Tiger Shark (Galeocerdo cuvier): Tiger sharks are known for their unique tiger-like markings and are known to grow up to around 16 feet (5 meters) in length. They are powerful predators and can be found in various tropical and temperate oceans.
Atlantic Bluefin Tuna (Thunnus thynnus): The Atlantic bluefin tuna is a highly migratory fish found in the western and eastern Atlantic Ocean. It can grow up to around 10 feet (3 meters) in length and is highly prized for its meat.