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

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

A 500-million-year-old fossil from Morocco, discovered by Natural History Museum scientists, is offering extraordinary new insights into one of evolution's most puzzling transformations: how ...

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.

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 ...

Echinoderms, on the other hand, have five lines of symmetry radiating from a central point and no physically obvious head or tail. Yet they are closely related to animals like us and evolved ...

Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression patterns show how this body plan was acquired, and that the genes specifying head structures do ...

Fossil echinoderms, including the common Cambrian and Ordovician echinoderms figured here (Fig. 1 from Deline, et al., 2021; request permission to use here) have a rich and diverse fossil record.

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, ...