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The payara fish, also known as the Dracula Fish, is one fish with teeth on our list of eight. April 06, 2022 By Keith Sutton On many occasions, I’ve gotten distracted while fighting a fish, and when I finally had my quarry close enough to land, I quickly reached down and grabbed it by the … Read more
The evolution of the jaw is one of the most significant innovations in vertebrate history. A jaw allowed vertebrates to exploit a wide range of food and engage in predation and defense. Jawed vertebrates arose from non-jawed vertebrates that had a pharyngeal gill apparatus composed of gill bars and slits. Anterior gill bars evolved into … Read more
Introduction Striated muscle The neuromuscular junction Mechanical properties Cardiac muscle Striated muscle Jawed fishes The sharks and other cartilaginous fishes (the class Chondrichthyes) have modified the structure of the first two arches; the cartilages of the anterior arch form the mandible and upper jaw (palatoquadrate), and modifications also have taken place in the second, hyoid … Read more
Similar to other animals, fish have evolved to have different types of teeth depending on their diets. For example, most fish that eat other fish (carnivores) have teeth that are designed to puncture, hold on to, and cut their prey whereas most fish that eat plants (herbivores) have teeth that are more suited for shredding … Read more
Jaws are crucial to the evolutionary success of many animals, yet their origins have long been shrouded in mystery. Now a new discovery is shedding light on how the jaws of ancient fishes are related to our own. Prehistoric armoured fishes called placoderms were the first fishes to have jaws. They arose some time in … Read more
Road excavations in China’s Guizhou Province have unearthed a trove of ancient fish fossils. As a part of rock layers known as the Rongxi Formation, the new fossil bed is filled with never-before-seen species that push back the dates of our first jawed animal ancestors by about 15 million years. “Until this point, we’ve picked … Read more
Fish jaw Most bony fishes have two sets of jaws made mainly of bone. The primary oral jaws open and close the mouth, and a second set of pharyngeal jaws are positioned at the back of the throat. The oral jaws are used to capture and manipulate prey by biting and crushing. The pharyngeal jaws, … Read more
Lamprey fish have terrifying teeth and no jaw — but there’s a global movement to save this living fossil The blood-sucking, ancient lamprey might look spooky, but its evolutionary and culinary history is setting fishermen, conservationists, and chefs across the globe on a mission to preserve the living fossils in decline. Key points: Lamprey have … Read more
Primitive vertebrate’s sophisticated mandible rewrites evolutionary tree. It may be hard to see, but you seem to share a family resemblance with Entelognathus primordialis. The fish, which lived 419 million years ago in an area that is now part of China, is the earliest known species with a modern jaw. E ntelognathus primordialis is a … Read more