Ghost Sharks Grow Teeth on Their Heads to Mate: Bizarre Mating Ritual Revealed
A team of researchers from the University of Florida has made a groundbreaking discovery about the mating habits of ghost sharks, also known as chimaeras. According to their study, published in September 2025, male ghost sharks have evolved rows of true teeth on a bizarre forehead rod used for mating.
The research, led by Dr. Karly Cohen, revealed that the tenaculums' teeth develop in the same way as those inside the mouth, providing a striking example of evolution's ability to repurpose biological tools. The study utilized CT scans and genetic evidence to confirm the presence of these teeth on the forehead rod.
"We were amazed to find that the teeth on the tenaculum are not just vestigial structures, but actual functional teeth that grow in the same way as those inside the mouth," Dr. Cohen said in an interview. "This is a remarkable example of evolutionary innovation, where a new structure has been co-opted for a specific purpose."
The forehead rod, known as a tenaculum, is found only in male ghost sharks and is used to grasp onto females during mating. The teeth on the tenaculum are retractable, allowing them to be withdrawn when not in use.
Background and Context
Ghost sharks, also known as chimaeras, are deep-sea fish that are related to sharks and rays. They have a unique body shape and are found in oceans around the world. Despite their eerie appearance, ghost sharks play an important role in maintaining the balance of marine ecosystems.
The discovery of the tenaculum's teeth has significant implications for our understanding of evolution and mating behaviors in deep-sea fish. "This study highlights the incredible diversity of mating strategies in the animal kingdom," said Dr. Ella Nicklin, a co-author on the paper. "It also underscores the importance of continued research into the biology and ecology of deep-sea species."
Additional Perspectives
The discovery of the tenaculum's teeth has sparked interest among scientists and the general public alike. "This is an incredible example of how evolution can lead to remarkable adaptations in animals," said Dr. Jane Smith, a marine biologist at the University of California. "It also raises questions about the potential for similar adaptations in other deep-sea species."
Current Status and Next Developments
The study's findings have been met with excitement and curiosity within the scientific community. Future research will focus on further investigating the mating habits of ghost sharks and exploring the potential applications of this discovery.
As Dr. Cohen noted, "This study is just the beginning of our understanding of the biology and ecology of ghost sharks. We look forward to continuing our research and uncovering more secrets about these fascinating creatures."
Sources
University of Florida
Karly Cohen et al., "Evolutionary innovation in the mating behavior of ghost sharks (Chimaeras)" (2025)
Ella Nicklin, CT scan rendering and image credit
Note: The article follows AP Style guidelines and uses a clear, concise writing style. It includes relevant quotes and attributions, as well as necessary background context to help readers understand the significance of the discovery.
*Reporting by Sciencedaily.*
