| Male swordtail fish possess a long, colored extension of the caudal fin. |
| 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. |
| Koi, goldfish, guppy, sailfin molly, green swordtail, southern platyfish, variable platyfish, is undemanding. |
| Here, we examine male species recognition via odor cues in the swordtail fish. |
| 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. |
| But ongoing efforts to sequence genes from other fishes, including salmon and swordtail, will also help to test the theory, Postlethwait says. |
