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For different types of caudal fins (tail fins) click here.

The Evolution of Fins -

Fins originally evolved for locomotion, or thrust and rotation in an aquatic environment. Over hundreds of millions of years, fins have taken a variety of shapes and forms providing separate functions besides just locomotion.

Click on an image to enlarge the view.

Fishes have paired fins and median fins (non-paired fins).

Paired Fins

  1. Pectoral

  2. Pelvic

Median Fins

  1. Dorsal

  2. Anal

  3. Caudal

Other Fins

  1. Adipose

  2. Finlets