| Male swordtail fish possess a long, colored extension of the caudal fin. |
| Effect of dietary HUFA on reproductive performance, tissue fatty acid profile and desaturase and elongase mRNAs in female swordtail xiphophorus helleri. |
| If true, he said, the evolution of this mating preference might help explain the evolution of swords in male swordtail fishes. |
| Biology and invasive potential of the introduced swordtail Xiphophorus hellerii Heckel in Western Australia. |
| In the study, the sheepshead swordtail fish fish were placed in pairs in a fish tank, food was added and their behaviour was captured on film. |
| The smartest move any would-be pintail hunter can make is to keep his eyes and mind open to exactly where the swordtail bird is working. |
