Fossil crinoids (Jimbacrinus bostocki). Close-up of a rock containing crinoid, or sea lily, fossils. Crinoids are marine echinoderms that have been in existence for 500 million years. Thousands of extinct crinoid species have been found as fossils, but only a few hundred species still exist today. They attach themselves to the sea floor with their stem and use their feathery arms to filter food from the water. This fossil dates from around 280 million years ago during the Permian period and was found in Australia.
Model release not required. Property release not required.