How to Identify Bull Shark

To identify Bull Shark (Carcharhinus leucas), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dorsally grey to olive-brown, fading to a white or yellowish-white ventral surface. Juveniles may have dusky fin tips, which fade with age.

Scale type

placoid

Mouth position

inferior

Distinctive features

Broad, flat, and short snout, shorter than the width of the mouth., Small eyes relative to body size., Large, triangular, serrated teeth in the upper jaw; narrower, pointed, and serrated teeth in the lower jaw., No interdorsal ridge (a key distinguishing feature from many other Carcharhinus species)., Robust, stocky body., First dorsal fin is large, triangular, and originates over or slightly in front of the pectoral fin axil., Second dorsal fin is significantly smaller than the first.

Dorsal fin

Two dorsal fins. The first is large, triangular, and erect, originating over or slightly anterior to the pectoral fin axil. The second dorsal fin is much smaller, about one-third the height of the first, and originates over the anal fin.

Tail fin

Heterocercal caudal fin, with the upper lobe significantly longer than the lower lobe, typical of active pelagic sharks.

Pectoral fin

Large, broad, and somewhat triangular pectoral fins.

Distinctive fins

No interdorsal ridge between the first and second dorsal fins.

Identification Tips

1. 1

   Snout Shape

   Look for a very broad, blunt, and short snout, shorter than the width of the mouth.

2. 2

   Dorsal Fins

   The first dorsal fin is large and triangular, originating over or slightly before the pectoral fin axil. The second dorsal fin is noticeably smaller, about one-third the height of the first. Crucially, there is no ridge between the two dorsal fins.

3. 3

   Body Build

   Bull sharks have a very stocky, robust body, giving them a powerful appearance.

4. 4

   Coloration

   Generally grey to olive-brown on the back, with a white underside. Fin tips may be dusky in juveniles but typically fade with age.

5. 5

   Habitat

   Its presence in freshwater or brackish environments is a strong indicator, as few other large sharks share this capability.

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