Fish

Fish

Information

Kingdom - Animalia Phylum - Chordata Subphylum - Vertebrata

Fish Characteristics
 * Body Structure
 * Bony or cartilaginous skeleton
 * Paired fins used for swimming and steering
 * Scales which serve as thin body plates
 * Jaws are used to crush and gnaw food
 * Body Functions
 * Gills are used for breathing
 * Two chambered heart
 * Cold Blooded (endothermic)
 * Swim Bladder is an air sac used to control how deep a fish can go in the water
 * Countershading is used to allow a fish to remain camouflage in all parts of the water. It has dark shading on the dorsal side and light shading on the ventral side.
 * The lateral line is a canal on the side of the the fishes body and is used to pick up vibrations.
 * Reproduction
 * All fish reproduce externally. One way they can reproduce is through spawning, where the females lay many eggs and they are all fertilized.
 * Another way fish reproduce is through External development in aquatic eggs.
 * Fish Classification
 * Class Agnatha
 * Jawless fish
 * Sucks blood from other fish
 * Skeletons made of Cartilage
 * Example would be a lamprey
 * Class Chondricthyes
 * Jaws are present
 * Skeleton are made of cartilage
 * Examples are Sharks, Skates and Rays
 * Class Osteicthyes
 * Bony fish
 * Most fish belong to this class
 * Examples are Perch, Musky, Tuna, Catfish, Bluegill

Article: [|http://www.] [|allgov.com/]

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