| 1 | The movement of a fish's tail fin helps propel a fish through the water. | |
| 2 | The important role of tail fin of a fish in swimming is to produce a thrust. | |
| 3 | This faster-moving air provides the pelvic fin with additional lift. | |
| 4 | The yawing can apparently attenuate the angular displacement of both the tail and the attack angle of tail fin. | |
| 5 | A tail fin, for example, has many different types of cells and is a very intricate structure. |