Sponges are simple animals that filter food from the water. They are not sustainable to use as cleaning sponges, so today's cleaning sponges are made of synthetic materials.
They first appeared around 530 million years ago and were very successful for a long time. However, their population declined sharply after the Great Permian Extinction 250 million years ago
Comb jellies are 500 million-year-old predators that can survive cold winters by cannibalizing their own young.
Jellyfish have been around for 500 million years and their resilience is what has helped them survive. They do not require as much oxygen as other marine life.
The shell of a nautilus is a natural example of a logarithmic spiral. This type of spiral is found in many other natural objects, such as the shape of galaxies and the horns of rams.
The Oldest Horseshoe Crab: 480 Million Years
Horseshoe crabs are ancient creatures that have survived for over 400 million years. They are most common in Delaware Bay, where they swarm the beaches during summer mating seasons.
The Oldest Velvet Worm: 400 Million Years Ago
Velvet worms are ancient, mobile predators that eat insects. They are found in rainforests around the world and can be kept as pets. In captivity, they can be fed crickets.
Oldest Vertebrate Animal Species: 400 Million Years
Lungfish are the oldest vertebrates on Earth, over 400 million years old. They have lungs that allow them to breathe air, which helps them survive in dry conditions.
Coelacanth: Living 400 Million Years Ago
Coelacanths are fish that evolved 400 million years ago. They have no spines, but instead have notochords that support their bodies.