no
No, trout are not jawless fish. They belong to the class Osteichthyes, which includes jawed fish with bony skeletons. Jawless fish belong to the class Agnatha, which includes animals like lampreys and hagfish.
Yes the hagfish is jawless.
Jawless fishes were the first vertebrates to live on earth. As their name suggests, they have no jaws. Instead, they have mouths for scraping, stabbing and sucking food. Their skeletons are made of cartilage, not bone. Hagfishes and lampreys are the only jawless fishes that are still alive. They are usually scavengers, that live near the ocean floor. Some can also be parasites.
Most fish are not jawless. There is a small group of very primitive fish called Jawless fish (Agnatha). However, they make up a very small proportion (<1%) of the fish species on earth. Jawless fish are things like lamprey and hagfish. All other fish, like trout, salmon, tuna, sharks, rays, cichlids, goldfish, etc, etc, have jaws. See the related link for more information on the primitive jawless fish.
yes, jawless fish have no paired fins
Jawless fish have an internal cartelagenous endoskeleton.
Clown fish do have jaws, so they are not a jawless fish.
Jawless fish are Phylum Chordata, they are also known as paraphyletic, they still are around today.
A group of jawless fish is commonly referred to as "agnatha."
Jawless Entelognathus primordialis is the most ancient fish.
jawless fishes and salamanders are alike in that both types animals
Jawless fish develope in an egg. The female jawless fish lays her eggs in turtle grass, where the male produces spurm and the egg developes.