| Between three and six long but narrow predorsal scales are located anterior to the origin of the dorsal fin. |
| With their long, slim bodies, they can be recognised easily by the large white tip on their first dorsal fin and the upper lobe of the tail. |
| Flagfin mojarra has a dark marking on the dorsal fin with a white stripe just below the dark marking. |
| The fins have strong leading rays, which form a row of sharp spines along the dorsal fin. |
| Like all salmonids the grayling has a small adipose fin behind the dorsal fin. |
| Male courtship display includes extending the dorsal fin, pursuing, and eventually biting the female. |
