Horseshoe CrabHorseshoe crabs have been around for about 450 million years, making them one of the oldest living species on Earth.
CoelacanthCoelacanths are ancient fish that date back about 360 million years. They were thought to be extinct until a living specimen was discovered in 1938.
NautilusThese cephalopods, with their distinctive spiral shells, have existed for over 500 million years and are considered "living fossils."
LampreyLampreys are jawless fish that have been around for approximately 360 million years.
TuataraTuataras are reptiles native to New Zealand and are often referred to as "living fossils." They have been around for over 200 million years.
Goblin SharkThe goblin shark is a rare deep-sea shark species believed to have existed in its current form for around 125 million years.
CrocodiliansCrocodilians, including crocodiles, alligators, and caimans, have been around for over 80 million years.
TardigradesTardigrades, also known as water bears, are microscopic animals that have been on Earth for at least 500 million years.