Jellyfish Are Older Than Dinosaurs and Trees
Jellyfish have existed for over 500 million years, predating dinosaurs, sharks, and even trees by hundreds of millions of years.
About this fact
Jellyfish are among the oldest living creatures on Earth, with fossil evidence dating back over 500 million years. This means they existed long before dinosaurs (230 million years ago), sharks (400 million years ago), and even trees (350 million years ago). They've survived multiple mass extinction events and have remained largely unchanged in their basic body plan. Despite having no brain, heart, or centralized nervous system, jellyfish have thrived in Earth's oceans for half a billion years. Their simple but effective design - essentially a bell-shaped body with tentacles - has proven to be one of nature's most successful survival strategies.