Image Information
Lobster
The text says the lobster has "horns", meaning claws. The artist has taken the description literally to draw a fish with two horns.
The image was obtained from the source listed below.
Bibliothèque Municipale de Valenciennes
Manuscript
Bibliothèque Municipale de Valenciennes, MS 320 (Liber de natura rerum), folio 127r
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Possible copyright holder
Medieval Bestiary site copyright information