ctenoidei

from The Century Dictionary.

• In L. Agassiz's system of classification, one of four orders of the class fishes, containing those in which the scales are ctenoid or pectinate.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of fishes, established by Agassiz, characterized by having scales with a pectinated margin, as in the perch. The group is now generally regarded as artificial.