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Fishes

Fishes. Key Characteristics. Informal description of aquatic vertebrates Paired Fins Scales Gills. Feeding and Digestion. Herbivores, Carnivores, Parasites, Filter Feeders, Detritivores . Specialized teeth and jaws Crop Esophagus, Stomach, Liver, Pancreas . Circulation. Closed

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Fishes

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  1. Fishes

  2. Key Characteristics • Informal description of aquatic vertebrates • Paired Fins • Scales • Gills

  3. Feeding and Digestion • Herbivores, Carnivores, Parasites, Filter Feeders, Detritivores. • Specialized teeth and jaws • Crop • Esophagus, Stomach, Liver, Pancreas

  4. Circulation • Closed • Single Loop Circulatory System • Two Chambered Heart

  5. Respiration • Gills • Some have specialized Lungs (Lungfish)

  6. Excretion • Diffusion across Gill Membrane (Carbon Dioxide) • Kidneys (Ammonia)

  7. Response • Brain with many parts (lobes) • Highly developed sense organs • Lateral Line System

  8. Movement • Paired Muscles along Spine • Highly Maneuverable • Gas-filled Swim Bladder for Buoyancy

  9. Reproduction • External or Internal Fertilization • Oviparous: Embryos develop in egg outside of mother • Ovoviviparous: Embryo develop in mother, use yolk sac for nutrients • Viviparous: Embryo develop in mother, nourished through mother’s body

  10. Groups of Fishes • Largest group of vertebrates • More than 30,000 species • Jawless fish: Lamprey, Hagfishes • Cartilaginous Fishes: Sharks, Skates and Rays • Bony Fishes: Ray-finned Fishes (trout) and Lobe-finned Fishes (Lungfish and Coelacanths)

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