Anapestic octameters are very rare, but the example below has enough anapests to distance it from a heavily substituted iambic meter:

            O mother, mother, in tears I checked the sad hours past of the year that's o'er,
            Till by God's grace I might see his face and hear the sound of his voice once more;
            The chair I set from the cold and wet, he took when he came from unknown skies
            Of the land of the dead, on my bent brown head I felt the reproach of his saddened
            eyes;
            I closed my lids on my heart's desire, crouched by the fire, my voice was dumb.
            At my clean-swept hearth he had no mirth, and at my table he broke no crumb.
            Deelish! Deelish! my woe forever that I could not sever coward flesh from fear.
            His chair put aside when the young cock cried, and I was afraid to meet my dear.
                                                                                        --Dora Sigerson Shorter