Holaxonia

thumb|right|Leptogorgia palma thumb|right|Gorgonia flabellum Gorgoniidae is a family of soft corals in order Malacalcyonacea. Nearly all the genera and species are native to the east and west coasts of America.

Plexauridae is a family of marine colonial octocorals in the phylum Cnidaria. Members of this family are found in shallow tropical and subtropical seas. Many species contain symbiotic photosynthetic protists called zooxanthellae.

Keroeididae is a family of cnidarians belonging to the order Malacalcyonacea.

Acanthogorgiidae is a family of cnidarians belonging to the order Alcyonacea.

thumb|right|Paramuricea sp. thumb|right|Eunicea sp.