“Three Fish Groups” Discovery Education Video Transcript
Though there are thousands of different kinds of fish, amazingly, they all fit into just... Here, we see a lamprey. It's the long, snake-like fish swimming with the others. Lampreys are what scientists call a "jawless" fish. ...are the first major fish group. As you can see, they have round mouths without jaws. That's why they're called jawless fish. Lamprey, and other jawless fish, have skeletons made of cartilage. ...is a tough, flexible tissue that's softer than bone. These scientists are working with a ray. Rays are a... The second group. Other cartilaginous fish include sharks and skates. Like lampreys, cartilaginous fish also have skeletons made of cartilage. Unlike lampreys, however, cartilaginous fish have mouths with movable jaws. Moving on to the next group, here are some goldfish. They are typical bony fish, the third and by far the largest fish group. Bony fish are usually what come to mind when we hear the word fish but as many as their as and as different as they can look. All bony fish share one key feature, they all have skeletons made from bone and not the cartilage we have seen so far, that’s why we call them bony fish. Bony fish are valuable to us for the recreational fishing they provide and the highly nutritious food that they are..