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In Images: A Filter-Feeding Cambrian Creature

Cambrian sea monster

artists reconstruction of cambrian creature

(Image credit: Bob Nichols/University of Bristol)

Scientists have unearthed the fossil of an ancient, filter-feeding sea creature that dates to 520 million years ago.

Filter feeder

tamiscolaris borealis fossil

(Image credit: Jakob Vinther/University of Bristol)

The creature, dubbed Tamiscolaris borealis, used its comblike appendages to rake the seas for shrimplike food similar to krill.

Greenland trove

sirius passet formation area in Greeland

(Image credit: Jakob Vinther/ University of Bristol)

The fossil was unearthed in sediments in northern Greenland known as the Sirius Passet formation.

Excavations proceed

excavations in greenland

(Image credit: Jakob Vinther/University of Bristol)

Here, researchers on the team dig at the site. Research can only take place in six weeks of summer, when the weather is hospitable.

Apex predators


(Image credit: Esben Horn)

The filter feeder was part of a group of Cambrian creatures named anomalocarids, which were the apex predators of the day. They usually had grasping claws in front for snagging prey.

Cambrian explosion


(Image credit: Yie Jang (Yunnan University))

The Cambrian explosion gave rise to a host of bizarre and complex creatures, such as this fuxhianhuiid arthropod from China,

Tia Ghose
Tia has interned at Science News,, and the Milwaukee Journal Sentinel and has written for the Center for Investigative Reporting, Scientific American, and ScienceNow. She has a master's degree in bioengineering from the University of Washington and a graduate certificate in science writing from the University of California Santa Cruz.