Copepods often live in association with other marine invertebrates. More than 400 species of copepods live with about 350 cnidarians, particularly in tropical areas. The greatest numbers of these ...

Jellyfish belong to one of the oldest extant animal phyla, the Cnidaria. The first Cnidaria appear in the fossil record 600 million years ago, preceeding the Cambrian explosion. They are an extremely ...

I’ve got an article in today’s New York Times about jellyfish and their kin—known as cnidarians. Cnidarians look pretty simple, which helped earn them a reputation as simple and primitive ...

So it’s surprising that this species in the phylum Cnidarians (along with jellyfish, corals, and other sea creatures) contains an ancient blueprint for bilaterians, of which Homo sapiens are a ...

All the A. queenslandica ANTP genes are members of the NK family, and there are no true members of the Hox family itself. This is in contrast to cnidarians, which have homologues of bilaterian Hox ...

Here’s what you’ll learn when you read this story: One major division of the kingdom Animalia is Cnidarians (animals built around a central point) and bilaterians (animals with bilateral ...