Actinopterygii

Directory

References

Videos

Study the roles of a fish's scales, swim bladder, and gills in its respiratory system

All about ray fins: Seahorses, trunkfish, and more

Discover

Panama Canal infographic

Timeline and Map of the Panama Canal

Four year old boy with grandfather and father lighting Hanukkah menorah. Photo taken on: December 21st, 2009

Which Is Correct: Hanukkah or Chanukah?

Colorful winter sunset

What's the Difference Between a Solstice and an Equinox?

The Battle of Gettysburg, July 1-3, 1863. (Civil War, Pennsylvania)

9 Worst Generals in History

Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society

The 10 Greatest Basketball Players of All Time

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Srinivasa Ramanujan, Indian mathematician and autodidact.

6 Interesting Facts about Srinivasa Ramanujan

Actinopterygii: Media

fish taxon

Videos

Study the roles of a fish's scales, swim bladder, and gills in its respiratory system

Study the roles of a fish's scales, swim bladder, and gills in its respiratory system

The scales, swim bladder, and gills of the ray-finned fishes.

Video: Encyclopædia Britannica, Inc.

All about ray fins: Seahorses, trunkfish, and more

All about ray fins: Seahorses, trunkfish, and more

Ray-finned fishes are found in freshwater and saltwater habitats around the world...

Video: Encyclopædia Britannica, Inc.