The Collaborative International Dictionary
Cow-pilot
Cow-pilot \Cow"-pi`lot\ (kou"p[imac]`l[u^]t), n. (Zo["o]l.) A handsomely banded, coral-reef fish, of Florida and the West Indies ( Pomacentrus saxatilis); -- called also mojarra.
Wiktionary
cow-pilot
n. A fish, the mojarra.