Horseshoe Crab: Dating back over 450 million years, horseshoe crabs have survived several mass extinctions and can still be found in oceans today.
Coelacanth: Once thought to be extinct for millions of years, the coelacanth was rediscovered in 1938. These fish have been around for over 360 million years.
Nautilus: The nautilus is a cephalopod that has remained relatively unchanged for the past 500 million years.
Lamprey: Lampreys are jawless fish that have been around for over 360 million years and are known for their parasitic feeding habits.
Goblin Shark: Believed to have been around for over 125 million years, the goblin shark is known for its unique appearance and deep-sea habitat.
Hagfish: Similar to lampreys, hagfish are jawless fish that have been around for over 300 million years.
Crocodilians: Crocodilians, including crocodiles, alligators, and caimans, have been around for over 200 million years and are often referred to as "living fossils."
Tuatara: Found only in New Zealand, the tuatara is a reptile that has been around for over 200 million years and is the last surviving member of its order.
Cockroach: Cockroaches have been around for over 300 million years and are known for their resilience and ability to adapt to various environments.
Tardigrade: While not technically an ancient animal, tardigrades, also known as water bears, are microscopic animals that have been around for over 500 million years.