The Collaborative International Dictionary
Oquassa
Oquassa \O*quas"sa\, n. (Zo["o]l.) A small, handsome trout ( Salvelinus oquassa), found in some of the lakes in Maine; -- called also blueback trout.
Wiktionary
oquassa
n. (context archaic English) A small, handsome trout, (taxlink Salvelinus oquassa species noshow=1), found in some of the lakes in Maine. (fell out of use around 1920)