Tag Archives: forehead

Are those teeth on your forehead or are you just happy to see me? In the curious case of chimaeras, also called ghost sharks, the answer is ‘both.’ These forehead-teeth are attached to a retractable stalk called a tenaculum, and they help chimaeras have sex. Because of course. Whether these nodules are true teeth in every sense of the word, …

If you are human, you might believe that teeth belong in the mouth. If you are a fish, you already know better. You know that teeth belong in the skin too. These teeth are fittingly called dermal denticles: skin teeth. (Mouth teeth are just called teeth, a testament to how the teeth brand has historically hitched its horse to mouths.) …

It’s not easy to have sex when you’re a couple of slippery, limbless fish in the ocean.  But the ratfish has a workaround. The male has a unique, club-shaped appendage on its forehead, called a tenaculum, which it uses to cling to the female’s pectoral fin while mating. Some scientists thought these appendages were lined with the same hard, spiny …

Spotted ratfish are scaleless, rabbit-faced deep-sea fish, about two feet (61 centimeters) long, and native to the northeastern Pacific Ocean. As if that wasn’t a strange enough description, these distant shark cousins also feature teeth on their foreheads. While a number of marine animals, such as sharks, rays, and whale sharks, have external tooth-like structures called denticles, it turns out …

Get to Know the Ratfish and the Forehead Teeth It Uses During Sex  The New York Times Ghost sharks grow forehead teeth to help them have sex  University of Florida This Gloriously Weird Fish Has Teeth on Its Forehead for Sex  Scientific American This common fish has an uncommon feature: Forehead teeth, used for mating  UW Homepage ‘Ghost sharks’ are lurking off the coast …

On Thursday, the Las Vegas Raiders made the stunning decision to release defensive tackle Christian Wilkins, just a year after signing him to a lucrative deal. But though the Raiders chose to release Wilkins based on how he had been rehabbing a foot injury, there may have been an additional wrinkle in the decision. ESPN’s Adam Schefter reported Monday about …

Emily Haley inherited her father’s fair complexion, and was diligent all her life about wearing SPF on her face and body.  She knew skin cancer was a possibility, given her parents’ history of skin cancer, but when a strange spot appeared on her forehead, she thought it was a pimple. The spot appeared a little over a year ago and lasted …