Ctenophora

Ctenophora (commonly known as comb jellies) are a phylum of invertebrate animals that live in marine environments worldwide. They are notable for their unique feature of 'combs', or groups of cilia that they use for swimming, and are the largest animals that swim by means of cilia.

Anatomy and Morphology

Ctenophores are characterized by their gelatinous bodies and eight rows of cilia, which are used for locomotion. These cilia are arranged on the surface of the body in comb-like plates, hence the name 'comb jellies'. Most species of ctenophores are transparent and have a body composed of a soft, gelatinous substance, which is about 99% water.

Behavior and Ecology

Ctenophores are predominantly carnivorous, feeding on a variety of small planktonic animals. Some larger species are known to consume other ctenophores. They capture prey using two long, sticky tentacles that can be retracted into pouches on their bodies.

Classification and Evolution

The classification of ctenophores has long been a subject of debate among scientists. Traditionally, they have been classified as a type of cnidarian, but more recent studies suggest that they may represent a separate lineage.

See Also

• Cnidarian
• Invertebrate
• Marine biology

References

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