Hydrozoa represent one of the most speciose and morphologically varied lineages within the phylum Cnidaria, encompassing solitary hydroids, colonial branching forms and free-swimming medusae.

The cnidaria collections include corals, jellyfish, sea anemones, octocorals and hydroids, with approximately 20% of the specimens known to be types. The geographical strength of the collection is our ...

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Jellyfish are some of the Earth's most ancient extant animals. They're also immensely diverse—most organisms that are called jellyfish are part of the phylum Cnidaria, which includes more than 10,000 ...

Spontaneous rhythmic contractions of the intestinal tract, also known as peristalsis, play an important role in enabling healthy gut function in the vast majority of living organisms. This intrinsic ...