Description: Quite a detailed depiction. The body is covered in scales indicated by shallow curved notches, with two leaf-shaped fins along the base of the body on either side and a raised dorsal fin with vertical grooves. The tail fin has radiating grooves. The gills are shown, the eyes are ring and dots and there is a short horizontal notch for the mouth. Elliptical cross-section, maximum thickness 5 mm.
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Image: Courtesy of the British Museum.