JAN 03, 2018 05:42 PM PST

A walk around the block as a starfish

4 10 341

You may never have paused to think about how a sea star moves about on the seafloor, or even on the beach, for that matter. But sea stars, commonly called starfish, have hundreds of tiny feet on the bottom of each of their "arms," also known as rays. These little feet are called tube feet, or podia and help the animals move around, as you can plainly see in the video above. But how do they do it?!

A sea star's podia are filled with sea water, as is the sea star's vascular system. Sea stars are able to transfer water from their vascular systems into their tube feet and then use that pressure to expand them and move around. They even have muscles in their feet that allow them to retract their feet! Want to see it in action? Watch the video!
About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
JUL 02, 2018
Videos
JUL 02, 2018
Watch SpaceX's Dragon Cargo Ship Dock with the International Space Station
Just as expected, SpaceX’s Dragon cargo spaceship docked with the International Space Station on Monday to provide crew members with fresh food, supp
JUL 17, 2018
Videos
JUL 17, 2018
Novartis Ends Antibiotic Research
The United Nations has warned that by 2050, antibiotic-resistant microbes might kill ten million people every year.
JUL 18, 2018
Videos
JUL 18, 2018
Brain Differences in Men and Women
Men and women are different, of that there is no doubt. In neuroscience, there has been a lot of research into these differences, as they relate to treatin
AUG 01, 2018
Videos
AUG 01, 2018
Goodbye to the Endangered Species Act?
The Endangered Species Act, which protects more than 2,000 plant, animal and insect species at risk of
AUG 09, 2018
Videos
AUG 09, 2018
Can You Drink Too Much Water?
Especially during a long hot summer, staying hydrated is essential. Dehydration can have severe consequences in children, the elderly and those with immune
AUG 15, 2018
Videos
AUG 15, 2018
CBD Being Used in Stem Cell Research
CDKL5 (cyclin-dependent kinase-like 5) is a gene that is found on the X-chromosome, mutations to this gene lead to a rare genetic disorder. Scientists
Loading Comments...