Shrimp is world’s oldest unchanged animal

Published on July 29th, 2010 | by Admin

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tadpole

Fossil evidence shows that the tadpole shrimp is one of the world’s oldest unchanged animals, remaining virtually the same for 200 million years.

Fossil finds show that the shrimp is virtually the same today as it was 200 million years ago, when the first dinosaurs evolved.

The shrimps are adapted to living in temporary water pools. When the water dries up, the adults die but leave behind eggs that can remain dormant for years until wet conditions return.

Understanding the animal’s unusual lifestyle helped researchers from the University of Glasgow make the discovery announced today.

Mud thought to contain tadpole shrimp eggs was sampled from pools around Caerlaverock, dried, re-wetted and placed in small aquaria.

The scientists were startled to find a large shrimp swimming in one of the tanks within a couple of weeks.

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