Linked from
The 27 pages that link to Cnidaria, each with the reason it gives.
Germ layerRelated: Cnidarians provide familiar examples of animals with a diploblastic organization.
Nerve netRelated: Cnidarians are the best-known animals with nerve nets.
ChaetognathaRelated: Cnidarians are gelatinous marine predators often compared with arrow worms.
WentletrapRelated: Sea anemones and corals are common prey or hosts in wentletrap ecology.