Madreporaria

• Maeandra

  Brain corals.

• Acropora

  Coelenterate genus of order Madreporaria, including staghorn corals.

• Fungia

  A genus comprising the usual mushroom corals.

Siphonophora

• genus Nanomia

  A genus of Siphonophora.

• Physalia

  Portuguese man-of-war.

Hydrozoa

• genus Hydra

  Hydras.

• Sertularia

  Sessile hydroid that forms feathery colonies.

Also contains

• Pennatula

  Type genus of the family Pennatulidae: sea pens.

• Chrysaora

  A genus of Scyphozoa.

• Actinia

  A genus of sea anemone common in rock pools.