Which fish has triangular teeth?

A piranha is a freshwater fish that inhabits South American rivers, floodplains, lakes and reservoirs. Although often described as extremely predatory and mainly feeding on fish, their dietary habits vary extensively, and they will also take plant material, leading to their classification as omnivorous.

All piranhas have a single row of sharp teeth in both jaws. The teeth are tightly packed and interlocking (via small cusps) and are used for rapid puncture and shearing. Individual teeth are typically broadly triangular, pointed, and blade-like (flat in profile).

More Info: en.wikipedia.org

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12 Comments

Barbara Hauck

As the wolf said to Red Riding Hood. The better to eat with, my dear. 😎

Steve Tingle

I have a number of fossil shark's teeth (which are unchanged in modern sharks) and they are triangular, but maybe not all of them.

Bob Gorby

Also the name of the car specifically designed for the TV spy-drama series, The Man from UNCLE. The actors Hated it: no air conditioning, and low-slung gull wing doors made it Very hard to enter and exit the car.

Patsy Burchell

Picture gave it away lily

earlepg

earlepg, Not covered in the article, but I found the following interesting, so I looked it up: those teeth, twenty in number, are in a single row and are arranged in groups of four (left/right and upper/lower) with the lower jaw outside the upper to facilitate ripping into their prey.