1. Class Osteichthyes

2. ALL Osteichthyes have…
Skeleton of bone
Gill covering = operculum
Swim bladder (helps float)
Ex: bony fish

3. 2 SUBCLASSES 1. LOBE-FINNED FISH (7 sp)
Fleshy fins supported by bones (limb-like)

4. COELACANTH
- believed to have become extinct w/dinosaurs 65mya (rediscovered 1938 S. Africa)
nd sp discovered Indonesia

6. Extinct ones were ancestors to amphibians & all terrestrial verts.

7. LUNGFISH
Modified swim bladder for breathing air
Africa, S. Amer., Australia (1 sp ea)
Burrow in mud & create mucus lined burrow

8. To 6 feet

10. 2. RAY-FINNED FISH
Majority of bony fishes
Very diverse in shape, size, color, feeding, etc.

11. Classification- Dichotomous Keys
Organized set of couplets (2) of exclusive characteristics of biological organisms.
Goes from general characteristics to more specific characteristics.
Example: 1. a. Does the fish have a snake-like body? If yes, proceed to #2 b. No snake like body? Proceed to #3