An illustration from the Bern Physiologus labelled De Ceto Magno Aspidohelunes (on this great Aspidochelone) (Bern, Burgerbibliothek, Cod. 318fol. 15v: https://www.e-codices.unifr.ch/en/list/one/bbb/0318 CC BY 4.0, color and contrast corrected).