Cnidarians
This reading profile brings together 2 source-linked articles that reference cnidarians.
Fauna does not yet have a full sourced identification profile for this name, so this page keeps the relevant reading together without inventing missing species detail.Source-linked reading
- Field guideHow corals build reefsA coral reef is built colony by colony and generation by generation. Living polyps add skeletal cups at the surface, while older skeletons, binding organisms, sediments, growth, breakage, and erosion shape the framework below.
- Field guideHow jellyfish swimA jellyfish swims by cycling its flexible bell through contraction and refill. The pulse transfers momentum to water, while bell shape determines whether a narrow jet or broad rowing motion dominates and whether vortices return useful energy.