Fish


 * Fish Facts!**

Body Structure:
 * Either have a bony or cartilaginous skeleton
 * Paired fins for swimming and steering
 * Thin bony plates called scales
 * Jaws for crushing and gnawing food

Body Function:
 * Gills - for breathing
 * Two-chambered heart
 * Ectotherms (cold-blooded)
 * Swim Bladder - air sac used to control depth in water
 * Countershading - dark on dorsal side, light on ventral; used for camouflage
 * Lateral line - canals on the side of the body used to pick up vibrations

Reproduction:
 * External fertilization
 * Spawning: females lay many eggs
 * External development in an aquatic egg

Class: Agnatha -
 * Classification and Taxonomy:**
 * Jawless
 * Suck blood from other fish
 * Skeletons made of cartilage
 * Example: Lampreys

Class: Chondricthyes -
 * Have jaws
 * Skeletons made of cartilage
 * Examples: Sharks, skates, and rays

Class: Osteicthyes:
 * Bony fish
 * Most numerous species of all fish classes
 * Examples: Perch, Musky, Tuna, Catfish, Bluegill, etc.
 * Pictures:**

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PARROT FISH- []

BETA FISH- []

BUTTERFLY FISH- []

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media type="custom" key="8665234" Video Clip 1: This video gives you an upclose and personal look at the Bull Shark Citation: []

media type="custom" key="8665874" Video Clip 2: "Prehistoric Shark Seen Attacking Deep Bait Citation: []

**FISH ARTICLE:** []