Alcyonacea
Definition
Noun 1. A taxonomic order of marine animals: Alcyonacea is the scientific order name for a large group of soft corals. These are colonial cnidarians related to stony corals but lacking a hard, massive calcium carbonate skeleton. Instead, they have a flexible, often leathery structure supported by small, internal skeletal elements called sclerites.
Usage
- Scientific Classification: The term is used almost exclusively in scientific, biological, or marine contexts to classify and discuss these organisms.
Advanced Usage
- The order Alcyonacea falls under the subclass Octocorallia, as its polyps characteristically have eight tentacles.
- In marine ecology, the health of Alcyonacea populations can be an indicator of reef conditions.
Variants and Related Words
- Alcyonacean (adjective/noun): Pertaining to the order Alcyonacea; a member of this order.
- Soft coral (common noun): The common name for organisms in the order Alcyonacea.
Synonyms
- Soft corals (common name)
- Octocorals (broader taxonomic subclass that includes Alcyonacea and other orders like Pennatulacea)
Related Terms (Scientific Context)
- Scleractinia: The order of stony or hard corals, often contrasted with Alcyonacea.
- Cnidaria: The phylum containing all corals, jellyfish, and sea anemones.
- Sclerites: The small, calcareous spicules that provide internal support for soft coral tissue.
Noun
-
comprising the soft corals
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