How to Identify Shovelnose Guitarfish

To identify Shovelnose Guitarfish (Rhinobatos productus), look at these key features.

Physical Characteristics

Body shape

flat

Coloration

Dorsal surface typically sandy brown to olive-brown, often with scattered small dark spots or blotches, providing camouflage against the seafloor. Ventral surface is white or cream-colored.

Scale type

placoid

Mouth position

inferior

Distinctive features

Elongated, flattened body with a broad, shovel-shaped snout., Two prominent dorsal fins located far back on the body, closer to the tail., A distinct, shark-like caudal fin (tail fin)., Small, widely spaced denticles (placoid scales) giving the skin a rough texture., Eyes and spiracles are located dorsally.

Dorsal fin

Two well-developed, triangular dorsal fins of similar size, positioned posteriorly on the tail.

Tail fin

Heterocercal, shark-like caudal fin with a distinct upper and lower lobe.

Pectoral fin

Large, flattened pectoral fins that are fused to the head and body, forming the disc.

Distinctive fins

Pelvic fins are small and located beneath the pectoral fins. No anal fin.

Identification Tips

1. 1

   Snout Shape

   The most distinguishing feature is its broad, pointed, shovel-like snout, which is relatively long and narrow compared to other guitarfish species.

2. 2

   Dorsal Fins

   Two prominent dorsal fins are located far back on the body, closer to the tail than to the pectoral fins.

3. 3

   Coloration

   Its sandy brown to olive-brown dorsal coloration with occasional dark spots helps it blend into sandy or muddy substrates.

4. 4

   Body Profile

   Observe the overall body shape, which is flattened anteriorly (like a ray) but transitions to a robust, shark-like tail posteriorly.

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