Hydractinia symbiolongicarpus is a member of the phylum Cnidaria, making it a close relative of jellyfish and corals. The animal’s tendency to form large colonies comes with problems, says study ...

Stanley Gardiner and J.J. Lister. The Natural History Museum cnidaria collection is used for taxonomic research, studies of coral richness (species, generic, morphological, genetic), as well as for ...

Some species of nudibranch have turned to a life of crime, robbing prey of their only defences: their stings. Nematocysts are the venomous stinging cell organelles produced by cnidarians such as ...

realized they’d discovered a new species: Vitrumanthus flosculus, or the small flower zoantharian. Zoantharians are marine invertebrates related to other better-known cnidarians such as ...

Scientists have discovered that climate change surpasses every other threat to endangered species in the United States.