What complicates things is that by law (not science), surfperch is a bottomfish.

WAC 220-16-340

General definitions—Bottomfish.

The term "bottomfish," unless otherwise provided, is defined as including Pacific cod, Pacific tomcod, Pacific hake, walleye pollock all species of dabs, sole and flounders (except Pacific halibut), lingcod and all other species of greenling, ratfish, sablefish, cabezon, buffalo sculpin, great sculpin, red Irish lord, brown Irish lord, Pacific staghorn sculpin, wolf-eel, giant wry mouth, plainfin midshipman, spiny dogfish, six gill shark, soupfin shark and all other species of shark, and all species of skate, rockfish, rattails and surfperches except shiner perch.