Cnidaria
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Cnidaria is a phylum of animals containing over 11,000 species of aquatic invertebrates found both in freshwater and marine environments, including jellyfish, hydroids, sea anemones, corals and some o
Pacific sea nettles, Chrysaora fuscescens
Oral end of actinodiscus polyp
Cerianthus filiformis (Ceriantharia)
Sea anemones (Actiniaria, part of Hexacorallia)
Coral
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Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the impor
Cnidaria
…of aquatic invertebrates found both in freshwater and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites. Their distinguishing features are an decentralized nerve net distributed throughout a gelatinous body, and…
Brain coral spawning
Anatomy of a stony coral polyp
Montastraea cavernosa polyps with tentacles extended