Types of fish that live in the ocean?

- Most diverse group of fish

- Examples: Tuna, Salmon, Goldfish

2. Cartilaginous fish - Chondrichthyes

- Sharks, rays, skates, chimaeras

- Have skeletons made of cartilage rather than bone

3. Jawless fish - Agnatha

- Most primitive group of fish

- Lack jaws and paired fins

- Examples: hagfish, lampreys

4. Lampreys - Petromyzontiformes

- Eel-like, jawless fish with rasping tongues

- Parasites or predators on other fish

5. Hagfish - Myxinidae

- Eel-like, eyeless fish without paired fins

- Produce large amounts of slime when threatened

6. Coelacanths - Latimeriidae

- Primitive, lobe-finned fish thought to be extinct

- Two living species discovered in the 20th century

7. Lungfish - Dipnoi

- Primitive fish that can breathe air using lungs

- Able to survive in low-oxygen environments

8. Flatfish - Pleuronectiformes

- Have flat bodies and swim on one side

- Flounders, sole, halibut

9. Mackerel - Scombridae

- Fast-swimming predators

- Tuna, bonito, mackerels

10. Cod - Gadidae

- Commercially important food fish

- Cod, haddock, Pollock