Fish

Fish notes:
 * = Body Structure =

o Bony or cartilaginous skeleton o Paired Fins: used for swimming, steering, and balance o Scales – thin, bony plates o Jaws: used for crushing and gnawing food

o gills for breathing o 2-chambered heart o ectothermic (cold-blooded) o swim bladder – air sac used to control depth in water o EXTERNAL FERTILIZATION § Spawning - females lay many eggs § Milting - males fertilize eggs with milt (contains sperm) o EXTERNAL DEVELOPMENT in aquatic egg
 * Body Function
 * Reproduction


 * Classification & Taxonomy

 Class: Agnatha o Jawless fish o Example: lampreys and hagfish o Sharp rasping teeth allow suckers to suck blood from other fish o Skeletons made of cartilage

 Class: Chondricthyes o Cartilaginous fishes o Bodies made of cartilage o Ex. Sharks, skates, rays

 Class: Osteicthyes: o Bony Fish o Ex. Perch, tuna, musky Catfish, Bluegill, etc. o Most numerous species of all fish classes

**__Fish Videos__**
Video Clip 1: Large freshwater stingray that was found in Cambodia, and is believed to be able to grow to 1,000 pounds. If one that large is found, it will be known as the largest freshwater fish in the world. Citations: [] media type="custom" key="8693740"media type="custom" key="8697650" align="left"

Video Clip 2: A Chao Phraya Catfish is caught in a breeding pond. These catfish have teeth because they are predators, and can grow to be up to 9 feet long. Citation: http://video.nationalgeographic.com/video/player/animals/fish-animals/bony-fish/chao-phraya-ani.html

Photos of Fish