Shark Jaws | The Institute for Creation Research

Shark Jaws

Sharks are back in the news, and it’s in regard to their most formidable and fearsome structure—their jaws.

Zoologists recently studied the lower jaws of a number of shark species along with their lifestyle and published the results in the journal Communications Biology.1

To study the potential relationship between jaw morphology and the sharks' life style, a quantitative analysis was conducted using X-ray computed tomographic scans of the jaws of 90 shark species and preparing 3D reconstructions to estimate how jaw shape of sharks evolved through time.2

These researchers—who are part of an international team—reported, “The results illustrate the importance of prey, level in the marine webs and habitat in relation to jaw shape diversity among shark species.”2

Evolution is mentioned throughout the article. For example, the article at states: “How the shape of shark jaws changed during their evolution has now been investigated by an international and multidisciplinary research team...”2 But, what exactly is the kind of evolution being addressed? Real, vertical macroevolution of sharks (or any other creature) is not documented. Throughout history, sharks remain sharks.3-6

What is being reported is just variation in the mandible. Non-Darwinists would maintain such change is by way of engineered biological adaptability. In other words, this flexibility appears to be engineered within the sharks and not caused by the environment. This allows them to relate to their environment and make minor changes through appropriate innate self-adjustments. Random evolution has nothing to do with these design properties and processes. The sharks have been created with the genetic ability to move in and fill various aquatic niches.

Indeed, the article stated, “All of these adaptations allow [the sharks] to spread into virtually all marine habitats, with some species even venturing into freshwater.”2 These are clearly designed, purposeful, adaptations and not examples of “evolution driven by habitat.” The marine environment cannot exercise volitional agency, but the creation concept of organism-focused, continuous environmental tracking is clearly seen.

The article also states, “This [research] also helps to uncover the evolutionary causes of the differences in jaw morphology related to habitats.”2 There are no evolutionary causes; rather, the evidence reveals design-based features as sharks move into and adapt to new environments—seen, for example, in the changes in jaw morphology.

Sharks were designed by the Creator to inhabit an aquatic environment in the beginning.


  1.  López-Romero, F. et al. 2023. Shark mandible evolution reveals patterns of trophic and habitat-mediated diversification. Communications Biology. 6. 496.
  2. Science Writer. Jaw shapes of 90 shark species show evolution driven by habitat. Posted on May 16, 2023, accessed May 23, 2023.
  3. Sherwin, F. and J. Tomkins. New Shark Species is Still a Shark. Creation Science Update. Posted on January 17, 2019, accessed May 25, 2023.
  4. Sherwin, F. The frilled still a shark. Creation Science Update. Posted on February 2, 2015, accessed May 24, 2023.
  5. Thomas, B. Shark Study Hammers More Nails in Evolution's Coffin. Creation Science Update. Posted on June 15, 2010, accessed May 24, 2023.
  6. Sherwin, F. 2013. Shark Origins: An Evolutionary Explanation. Acts & Facts. 42 (12).

* Dr. Sherwin is science news writer at the Institute for Creation Research. He earned an M.A. in zoology from the University of Northern Colorado and received an Honorary Doctorate of Science from Pensacola Christian College.

The Latest
Ernst Haeckel: Evolutionary Huckster | The Creation Podcast:...
Ernst Haeckel, a German Zoologist, is famous for developing a series of images of embryos in development called Anthropogenie. These images,...

Bees Master Complex Tasks Through Social Interaction
Bees are simply incredible.1,2 These little furry fliers challenge the very foundation of Darwinism in many diverse ways. Bees have been...

The Tail of Man’s Supposed Ancestors
Although it has been known for decades and despite insistence to the contrary from the evolutionary community, man—Homo sapiens—has never...

When Day Meets Night—A Total Success!
The skies cleared above North Texas on Monday, April 8, for a spectacular view of the 2024 Great American Solar Eclipse. Hundreds of guests joined...

The Sun and Moon—Designed for Eclipses
Before discovering thousands of planets in other solar systems, scientists tended to assume that other solar systems would be very similar to our own....

Let ICR Help You Prepare for the Great American Solar Eclipse!
On Monday, April 8th, the moon will move directly between the earth and the sun, resulting in a total solar eclipse visible in northern Mexico, much...

Total Eclipse on April 8th
“You alone are the LORD; You have made heaven, the heaven of heavens, with all their host, the earth and everything on it, the seas and all that...

Dismantling Evolution One Gear At A Time! | The Creation Podcast:...
The human body is a marvel of complexity and the more we learn about it, the more miraculous our existence becomes! Can evolution explain the...

April 2024 ICR Wallpaper
"He appointed the moon for seasons; The sun knows its going down." (Psalm 104:19 NKJV) ICR April 2024 wallpaper is now available...

Creation's Easter Message
While many Christians still consider the creation doctrine a fringe issue, a proper understanding of the Christian message finds creation at its core...