Taxa

Actinopterygii

Class

Citation Formats

General Reference

Nature Atlas. "Actinopterygii." Accessed September 8, 2026. https://nature.interactiveatlas.org/taxa/class-actinopterygii.

APA Style

Nature Atlas. (n.d.). Actinopterygii. Retrieved September 8, 2026, from https://nature.interactiveatlas.org/taxa/class-actinopterygii

BibTeX

@misc{natureatlas-actinopterygii,
  author = {Nature Atlas},
  title = {Actinopterygii},
  year = {2026},
  url = {https://nature.interactiveatlas.org/taxa/class-actinopterygii},
  note = {Accessed September 8, 2026}
}

The ray-finned fishes: bony fish whose fins are supported by thin, bony rays radiating from the body rather than a fleshy lobe. Actinopterygii is overwhelmingly the largest class of fish and, indeed, of all living vertebrates, accounting for roughly half of all described vertebrate species.

Facts

Disputed

Member Species/Taxa Count

34,000 1

Approximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized.

Taxonomic Rank

Class 1

Scientific Name

Actinopterygii 1

Cross-Tradition Connections