E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Pikes Head (A).
A pikes head has all the parts of the crucifixion of Christ. There are the cross, three nails, and a sword distinctly recognisable. The German tradition is that when Christ was crucified all fishes dived under the waters in terror, except the pike, which, out of curiosity, lifted up its head and beheld the whole scene. (See PASSION FLOWER.)