Fish are cold-blooded aquatic animals with backbones, gills, and fins. Most fishes are in a shape called fusiform, which means torpedo-like. Fishes range in size from the reaches of only 12 mm (0.5 in) long and about 1.5 g (0.05 oz) in weight to much larger and heavier.

 

     Fish were one of the first animals to be hunted by human beings. People were dependent on fishes as food. They were a big part of the human diet. It is said that the search for codfish led French fishermen to the discovery of Canada. Also, villages sprang up across the coasts of Norway, Scotland, Japan, and many other places because of fish. Today fishes are harvested for unprocessed human food, fish meal, animal feed, and oil. 

 

 

 

http://www.bio.miami.edu/~cmallery/150/physiol/physiology.htm 

     This is a picture of a Chordate. Above the picture it explains what its about. 

    

     A fish is a limbless cold-blooded vertebrate animal with gills and fins that live mostly in water. There are several things about fish that make them unique from other things. First of all they were around before dinosaurs, 450,000,000 years ago. A fish has more species than all reptiles, birds, mammals, or amphibians combined. Also 15,000 species are expected to still be unfound. 

     The Main groups of fish are freshwater fish and salt water fish. Freshwater fish live in freshwater and salt water fish live in salt water. Although, only .01% of the worlds water is fresh 40% of fish species live in them. Saltwater fish usually live in 70 to 85 degree water. 

Here are some things that saltwater fish eat:

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http://saltaquarium.about.com/od/planasystem/ig/Guide-Charts--Tables--Diagrams/Primary-Food-Groups.htm

Here are some freshwater fish:

Acknowledgments: http://www.allposters.com/-sp/Fish-Freshwater-Posters_i314233_.htm

This is a diagram of a basic fish.

http://www.oceanoasis.org/fieldguide/images/fishparts.gif

     One of the many horrors of the amazon the Candiru Fish

http://www.youtube.com/watch?v=QQWgUht-ObI 

     Size solemnly matters in the fish world

http://www.youtube.com/watch?v=XC6I8iPiHT8&NR=1 

This video is about the Pistol Shrimp. The Pistol Shrimp shoots a blast of bubbles, almost like a gun, to hunt its prey.

Fish 6L 10 Questions

 

1. How many fish species are there?
2. How does the pistol shrimp work?
3. What does the Candiru Fish do?
4. When do scientists think the first fish came to be?
5. How do flying fish fly?
6. Why do fish have gills?
7. In what ways are fish unique?
8. Are there more types of freshwater fish or saltwater fish? And by how many (i.e a lot, a little, or none)
9. What are the main characteristics of fish?

10. If you could be a fish which one would you be?