percesoces

from The Century Dictionary.

• A group of fishes so called because its species partake of the characters of and are intermediate between the perciform and esociform fishes

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

• noun plural (Zoöl.) An order of fishes including the gray mullets (Mugil), the barracudas, the silversides, and other related fishes. So called from their relation both to perches and to pikes.