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10 BIGGEST Fish That Ever Existed On Our Planet?

10 Biggest Extinct Fish That Ever Lived Here’s an expanded article on the 10 Biggest Extinct Fish to Ever Live: --- 10 Biggest Extinct Fish That Ever Lived Throughout Earth's history, the oceans have been home to some truly gigantic fish species. While many massive marine creatures still roam the waters today, some prehistoric fish were even larger than modern sharks and whales. Here’s a look at ten of the biggest extinct fish to have ever existed. 1. Leedsichthys Time Period: Middle Jurassic (~165 million years ago) Size: Estimated 30–55 feet (9–16 meters) Weight: 20–50 tons Details: Leedsichthys was one of the largest bony fish ever. It swam in prehistoric seas, feeding on plankton using its massive gill rakers, much like modern whale sharks. Fossil evidence suggests its skeleton was mostly made of cartilage, making complete specimens rare. 2. Dunkleosteus Time Period: Late Devonian (~358–382 million years ago) Size: Up to 33 feet (10 meters) Weight: ~4 tons Details: Dunkleosteus was a heavily armored placoderm with an incredibly powerful bite, capable of cutting through prey with its sharp, bony plates. It was one of the most fearsome predators of its time. 3. Megalodon (Otodus megalodon) Time Period: Miocene to Pliocene (3.6–23 million years ago) Size: 50–60 feet (15–18 meters) Weight: Up to 50 tons Details: One of the most famous extinct fish, Megalodon was a colossal shark that dominated prehistoric oceans. With teeth measuring over 7 inches, it fed on whales and large marine mammals. 4. Xiphactinus Time Period: Late Cretaceous (~66–100 million years ago) Size: Up to 20 feet (6 meters) Weight: ~500 kg Details: Xiphactinus was a massive predatory fish with a long, torpedo-like body and large, fang-like teeth. It was known for swallowing its prey whole, sometimes resulting in fossils with intact fish inside them. 5. Helicoprion Time Period: Permian (~250–290 million years ago) Size: 20–25 feet (6–7.5 meters) Weight: ~500 kg–1 ton Details: Helicoprion was a bizarre shark-like fish best known for its spiraled tooth whorl, which may have been used for slicing through prey. Despite its shark-like body, it was more closely related to ratfish. 6. Titanichthys Time Period: Late Devonian (~358–382 million years ago) Size: 16–20 feet (5–6 meters) Weight: Several tons Details: Titanichthys was a large placoderm related to Dunkleosteus but lacked powerful jaws. Instead, it likely used a filter-feeding strategy similar to modern baleen whales. 7. Rhizodus Time Period: Carboniferous (~300–350 million years ago) Size: 20–23 feet (6–7 meters) Weight: Estimated 1–2 tons Details: Rhizodus was a massive lobe-finned fish that lived in freshwater environments. With sharp teeth the size of human hands, it was an apex predator capable of hunting large amphibians and fish. 8. Hyneria Time Period: Devonian (~360 million years ago) Size: 12–16 feet (3.5–5 meters) Weight: ~500 kg Details: A giant predatory lobe-finned fish, Hyneria likely lurked in rivers and lakes, ambushing prey with a powerful bite. It was part of the lineage that eventually led to early land vertebrates. 9. Pachycormus Time Period: Jurassic (~150 million years ago) Size: Up to 15 feet (4.5 meters) Weight: Unknown, but likely several hundred kg Details: Pachycormus was an early member of the Pachycormiformes group, which included Leedsichthys. It had a streamlined body built for speed, possibly making it a fast-moving hunter. 10. Stethacanthus Time Period: Late Devonian to Early Carboniferous (~360 million years ago) Size: ~6 feet (1.8 meters) Weight: ~100 kg Details: Although not as large as the others on this list, Stethacanthus is notable for its strange anvil-shaped dorsal fin. This small shark-like fish likely used the structure for mating displays or species recognition. These prehistoric giants ruled the seas long before humans existed. Some were terrifying hunters, while others were gentle filter-feeders. Though they are now extinct, their fossils continue to reveal fascinating insights into Earth’s ancient oceans. Would you like any additional details or images to go with the article? #ExtinctAnimals #Extinct #ExtinctAnimalsFoundAlive #BiggestExtinctAnimals #ExtinctAnimalsAlive #ExtinctCreatures #ExtinctSpecies #ExtinctAnimalsCaughtOnCamera #ExtinctInsects #Top10 #BiggestExtinctCreatures #TerrifyingExtinctCreatures #ScaryExtinctAnimals #ExtinctOrAlive #ExtinctAnimalsThatMayStillBeAlive #LifesBiggestQuestions #Top10Extinct #ExtinctAnimalsThatMayStillRoamTheEarth #Biggest #MostDangerousExtinctAnimals #4kanimal