[ruhd-er-fish] 
) -fish, (especially referring to two or more kinds or species) -fish⋅es. | any of various fishes having the habit of following behind ships, as a pilot fish. |
| rud·der·fish (rŭd'ər-fĭsh') n. pl. rudderfish or rud·der·fish·es Any of several oval-shaped schooling fishes of the family Kyphosidae, found in tropical parts of the Atlantic and often sighted swimming behind ships. |