The cabezon also has a stout spine before the eye, an anal fin of soft rays, and a fleshy flap on the middle of the snout. A pair of longer flaps are just behind the eyes. The mouth is broad with many small teeth.
In addition to having a sturdy spine near the eye, a soft-rayed anal fin, and a fleshy flap on the middle of its snout, the cabezon also features two larger flaps behind the eyes. Its mouth is broad and contains many tiny teeth.