general characterictics
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GENERAL CHARACTERICTICS. Fish are cold-blooded vertebrates that breathe with gills and move with the aid of fins. They have the most numerous vertebrates with more than 30, 000 species. All fish must maintain proper levels of salt and water in their bodies through osmosis. - PowerPoint PPT PresentationTRANSCRIPT
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GENERAL CHARACTERICTICSFish are cold-blooded vertebrates that breathe with gills and move with the aid of fins.They have the most numerous vertebrates with more than 30, 000 species.All fish must maintain proper levels of salt and water in their bodies through osmosis.Freshwater fishes: Body salts are higher in concentration than surrounding waterSaltwater fishes: Surrounding water has higher concentration than their bodiesMost fish are able to react to changes in water pressure, temperature, currents and sounds.Fish have taste buds in their mouth, on their lips and on their body and fins. Some are on their barbels (whisker-like projections around their mouth)Has highly developed sense of smellPhilippine island goby (Pandaka pygmea)The smallest fish.Only 1/3 or inch long.
Whale Shark (Rhincodon typus)The largest fish.Average size is 25 feet long.Grows about 50 feet and weigh up to 15 tons.