Learn how starfish got their shape after a complicated evolutionary process, starting with an ancestor that lived 500 million years ago.

Researchers examine a 500-million-year-old fossil from Morocco and find out that echinoderms went from bilateral to ...

Echinoderms are present in the ocean in great numbers. According to Pawson, sea cucumbers alone may comprise more than 90% of the weight of animals on the sea floor.

Starfish are echinoderms, a form of invertebrate marine animals known for radial symmetry and having spiny skin. Researchers said most animal species have similar genetic structures, prompting ...

Ellen Goethel is a marine biologist and the owner of Explore the Ocean World Oceanarium at 367 Ocean Blvd. at Hampton Beach.

Echinoderms are one of the most highly derived groups of animals with many species as significant components of several marine communities. They're classified by three fundamental shared ...

This seems to have solved the mystery of how the starfish got its arms. But it doesn’t necessarily answer the ‘why’. Imran ...

Global contribution of echinoderms to the marine carbon cycle: a re-assessment of the oceanic CaCO 3 budget and the benthic compartments. Ecological Monographs , 2009; 091222124538045 DOI: 10.1890 ...

Most echinoderms, including starfish, have a five-rayed symmetry. They're closely related to another invertebrate group, the acorn worms, and to vertebrates (animals with backbones).

Some of us never grow up. In fact I am writing this now in my Aquaman pajamas while laying on Return of the Jedi bedsheets*. Unlike my childlike tendencies, for other species sometimes delayed growth ...

All echinoderms start with spiny skin (thus the Latin name echinoderm, which means hedgehog-like). They have radial symmetry, meaning they are the same shape all around, ...