How to Identify Spadenose Shark

To identify Spadenose Shark (Scoliodon laticaudus), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dorsal surface is typically grey to grey-brown, sometimes with a yellowish tinge, fading to a paler, often white, ventral surface. Fins may have dusky tips, especially in juveniles.

Scale type

placoid

Mouth position

inferior

Distinctive features

Distinctive flattened, spade-like snout, noticeably broader than long., Small, slender body., Large, oval eyes., Short labial furrows., First dorsal fin originates over or slightly behind the pectoral fin free rear tips., Second dorsal fin is much smaller than the first and originates over the anal fin., Anal fin is smaller than the second dorsal fin.

Dorsal fin

Two dorsal fins. The first is moderately large and triangular, originating over or slightly behind the pectoral fin free rear tips. The second dorsal fin is much smaller, originating over the anal fin.

Tail fin

Asymmetrical caudal fin with a well-developed ventral lobe and a distinct subterminal notch on the dorsal lobe.

Pectoral fin

Moderately large and triangular.

Distinctive fins

No interdorsal ridge. Pectoral fins are relatively short and broad.

Identification Tips

1. 1

   Snout Shape

   The most distinguishing feature is its broad, flattened, spade-like snout, which is noticeably wider than it is long. This is unique among small coastal sharks in its range.

2. 2

   Dorsal Fin Origin

   The first dorsal fin originates over or slightly behind the free rear tips of the pectoral fins. This helps differentiate it from some other small requiem sharks.

3. 3

   Size

   Typically a small shark, rarely exceeding 70 cm (2.3 feet) in total length, with a maximum recorded size of about 100 cm (3.3 feet).

4. 4

   Coloration

   Uniform grey to grey-brown dorsal coloration with a paler underside, lacking prominent markings or patterns.

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