Guests planning to take advantage of Dollar Days on Sunday, December 4 should be aware that crowds will be heavier than usual and the Aquarium is expected to sell out. Official capacity information will be listed here. View Detailsabout Dollar Days

Animal Update - March 14

Published March 14, 2014

Purple Urchins in Surviving Through Adaptation

Five purple sea urchins have been added to our Surviving Through Adaptation exhibit.

national aquarium sea urchin

Did you know? Sea urchins are sometimes referred to as sea hedgehogs! These spiny animals are echinoderms - they're related to sea stars, sand dollars and sea cucumbers.

Sea urchins have movable spines that are used mostly for protection. Depending on the species, the spines can be solid, hollow or filled with poison!

Be sure to check back every Friday to find out what’s happening!

Previous Post
comments powered by Disqus

Featured Stories

Protecting Baltimore’s Canyon

Published October 24, 2016

Living Seashore Wins Top Honors!

Published September 14, 2016

Related Stories

Meet Our Mary River Turtle Hatchlings!

Published December 01, 2016

Animal Update: Stoplight Parrotfish

Published November 25, 2016