Sharks’ jaws can contain anywhere from 5 to 15 rows of teeth, with the bull shark boasting roughly 50 rows altogether. To put it another way, you may also find some sharks having 50,000 teeth in their lifespan.

Most shark breeds have white or cream-colored teeth, which acquire a black color after undergoing the process of fossilization. Since sharks shed their teeth often, the teeth get buried under sediment and start absorbing the minerals present there. This gives the teeth a dark color.