Gorgeous jaw of a giant guitarfish

The structure is the typical one of Rhinobatos, with the anterior part of the body flattened on the horizontal plane, in a triangular shape, ending in a sharp angle at the snout, featuring a raised rostrum on the midline. The pectoral fins are broad and form the posterior edges of the head, followed by the two ventral fins, clearly distinct from the former, at the base of which in males the claspers are found. There are no anal fins. The eyes are small and followed by the two spiracles. The mouth is located on the ventral side, preceded by two bilobed nostrils. The teeth are flat and molariform, suitable for grinding. Also on the ventral side there open bilaterally the five gill slits, of small size. The posterior part of the body, however, is more like that of sharks, with two triangular dorsal fins of nearly equal size, placed posteriorly relative to the ventrals, and preceded on the midline by a series of tubercles. The caudal fin is also triangular but does not have distinct lobes. It can be observed resting on sandy or muddy bottoms, sometimes partly buried. It is not a strong swimmer, to the point that it can be caught with bare hands. It is not dangerous to humans. Special lot: rostral crest Rhinobatos. Rhinobatos of truly large size. Good spear.

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