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no they have large bonelikes structures called the stonnes.
What else can I help you with?
What is class for cartilagious fish without jaws?
Cartilaginous fish without jaws belong to the class Agnatha. This class primarily includes jawless fish such as lampreys and hagfish. Agnatha is characterized by their elongated bodies, lack of paired fins, and a skeleton made of cartilage instead of bone. These fish are considered some of the most primitive vertebrates.
Are Agnatha internal fertilized?
Externally
What types of body covering do Agnatha have?
skin
What does the word agnatha mean?
without jaws
What are identifying characteristics of Agnatha?
Agnatha, also known as jawless fish, lack jaws and scales. They have a cartilaginous skeleton, a round mouth, and a single nostril on their head. Agnatha are also known for their ability to produce slime as a defense mechanism.
How do agnatha breath?
by the gill slits
How do class agnatha breathe?
with gills; they're fish!
What are three main groups of fishes?
Class Agnatha
What is the number of chambers in the agnatha heart?
Agnatha, such as lampreys and hagfish, have a two-chambered heart. The heart consists of an atrium and a ventricle, which pump blood through the circulatory system.
What is agnatha?
jawless fish. not very common today, but they were in the past.
What are the 3 characteristic of agnatha?
I don't know but i will do some research...
Does agnatha have ectoderm or endoderm?
Agnatha, which includes jawless fish like lampreys and hagfish, have all three germ layers: ectoderm, mesoderm, and endoderm. They exhibit the typical triploblastic organization found in most animals.
