Fish © 2009 Susan Anderson.

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Presentation transcript:

Fish © 2009 Susan Anderson

Characteristics of Fish Vertebrates (has a backbone) Gills Scales Fins Ectotherms (cold-blooded) Aquatic (live in the water)

Types of Fish Agnatha / Jawless Chondrichthyes / Cartilage Hagfish, Lampreys Chondrichthyes / Cartilage Sharks, Rays Always on the move (no operculum) Carnivores Osteichthyes / Bony Perch, Bass, Catfish Swim bladders/ buoyancy 95% of all fish

Fins / Movement

Obtaining Oxygen Use gills Water enters mouth Passes over gills (which allows oxygen to enter the blood stream and carbon dioxide to leave the blood) Water leaves through gill slits Blood circulates from gills to body to heart to gills.