A small wrasse (fish) of the tropical eastern Atlantic, the large males of which have a blue head and green body with vertical stripes, and the females and smaller males are predominantly yellowish.
Thalassoma bifasciatum, family Labridae
 Example sentencesExamples
-  Cleaning is not limited to the Labroides genus however; young bluehead and young Spanish hogfish in the Bahamas have also been observed cleaning larger fishes.
 -  Adult blueheads feed primarily on zooplankton and many small benthic organisms.
 -  I've seen creek chub out there before, but not blueheads.
 -  I have seen many female blueheads in with breeding colored males and never noticed a significant change in coloration.
 -  He was out early on the bright frosty morning and he had a good ‘plug’ of blueheads on his line when he caught the 9 lbs. of fish.