Often called the great marbled sculpin.  Found over rocky or shell-encrusted bottoms from shallow to moderately deep waters.  It feeds primarily on crustaceans and mollusks.<P> The male cabezon will not budge while guarding its nest and can even be touched by divers.<P> Edibility is good; the flesh is bluish-green but turns white when cooked.  The eggs of the cabezon are poisonous.<P> Range is from Alaska to Central Baja.