Broad, heavily serrated upper tooth or a narrower lower tooth with finer serrations.
Single upper teeth overlap strongly with dusky, sandbar and oceanic whitetip sharks. Exact species ID may require jaw position or locality.
01
ORIGINAL VISUAL PLATE
Front, edge and jaw position.
02
IDENTIFICATION TRAITS
What to inspect.
- Crown shape
- Broad triangle or Narrow dagger
- Cutting edge
- Fine serrations or Coarse serrations
- Side cusplets
- No side cusplets
- Root
- Wide / nearly flat root or Two distinct root lobes
- Reference tooth height
- About 10–38 mm, depending on age and jaw position
- Jaw variation
- Broad serrated uppers cut; narrower finely serrated lowers grip and pierce.
03
ECOLOGY + SCALE
The shark behind the tooth.
- Habitat
- Warm coastal seas, estuaries and freshwater rivers.
- Diet
- Fishes, rays, sharks, turtles, birds and mammals.
- Estimated shark size
- Commonly 2–3.2 m (6.5–10.5 ft); large females can be longer.
- Bite force
- A theoretical study calculated 36–2,128 N anteriorly and 170–5,914 N posteriorly across 73–285 cm sharks. Research source ↗
- Fossil occurrence
- Carcharhinus-type teeth are common, but exact bull-shark attribution can be difficult.
- Time range
- Living; fossil teeth also occur
04
FUNCTION
Form follows feeding.
Upper and lower teeth are heterodont: the uppers cut with broad triangular crowns, while the lowers are narrower and more erect.
05
LOOKALIKES
Do not stop at the first match.
LivingOceanic whitetipBroad serrated upper tooth paired with a more pointed lower tooth serrated mainly near its tip.Compare visual profile →LivingSandbar sharkBroad, serrated high-cusped upper teeth; narrower and more finely serrated lowers.Compare visual profile →LivingGreat hammerheadTriangular, strongly serrated crown that becomes increasingly oblique toward the jaw corners.Compare visual profile →
06
DIRECT COMPARISONS
Put it beside its closest rival.
AUTHORITATIVE REFERENCE
Open source ↗Florida Museum
The visual plate is original TuffShark artwork and is not copied from the reference. Use the source alongside formation age, locality and associated material.
HAVE A TOOTH TO CHECK?
Start a ranked identification →