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Fish

Fish. Classification. Kingdom- Animalia Phylum- Chordata Sub Phylum- Vertebrata Classes- Agnatha, Chondrichthyes, Osteichthyes. Fish Characteristics. Gills Backbone (vertebrae) Paired Fins Single Loop Circulation Two chambered heart. Fish Anatomy. Fins. Different Dorsal Fins.

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Fish

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  1. Fish

  2. Classification • Kingdom- Animalia • Phylum- Chordata • Sub Phylum- Vertebrata • Classes- Agnatha, Chondrichthyes, Osteichthyes

  3. Fish Characteristics • Gills • Backbone (vertebrae) • Paired Fins • Single Loop Circulation • Two chambered heart

  4. Fish Anatomy

  5. Fins

  6. Different Dorsal Fins

  7. Fish Respiration • Water flows over Gills as fish opens mouth and swims. • Water flows opposite direction of blood flow. • O2 diffuses from the water into the blood. • Gills are made of thousands of gill filaments. • Gills are covered by the Operculum.

  8. Up Close and Personal

  9. Fish Circulation • Fish heart has 2 chambers • Single loop circulation • Blood flows into gills, picks up O2, goes to the body, returns to the heart.

  10. Fish Reproduction • Most Fish reproduce sexually, and fertilize their eggs externally (Sharks-internally). • Spawning is the process of fertilizing eggs. • Baby fish are called FRY.

  11. Fish Adaptations • Lateral Line System- used to detect vibrations, orient the fish in water, it is a line of cells running down the side of the fish. • Operculum- gill cover, movement of operculum allows more water to be drawn in. • Swim Bladder- a gas filled sac that helps the fish maintain buoyancy. Sharks don’t have a swim bladder! • Fins- Dorsal, Caudal, Pectoral, Pelvic, Anal.

  12. Adaptations Air Bladder Operculum Lateral Gills Line Fins

  13. Agnatha Jawless fish: Lampreys, Hagfish

  14. Types of Agnathans • Hagfish- Ocean scavengers, not much is known about them. • Lamprey- fresh and salt water, they are parasitic and prey on other fish. * Both have cartilagenous skeletons and sucker-like mouths.

  15. Chondricthyes Cartilagenous Fish: Shark, Ray

  16. Chondrichthyes • Sharks are adapted for a predatory lifestyle. • Cartilage skeletons, stiff pectoral fins (speed). • No operculum, must keep moving to breathe. • Have live births. • Special scales feel like sandpaper. • Manta, and Sting Rays- live in shallow water, have mouths located on the underside, are fairly docile, wide flat bodies and wing-like fins that are flexible.

  17. Types of Chondrichthyes • Sharks andRays- have no operculum and must keep moving to breathe. • Have different kinds of scales that feel and look more like sandpaper. • Have skeletons made of cartilage not bones.

  18. Osteichthyes Bony Fish: Salmon, Carp, Tuna Over 20,000 different species

  19. Types of Osteichthyes Ray Finned: • Most fish are this type • Fins are supported by bony structures called Rays. • Teleosts are the most advanced form of ray finned fish (symmetrical tails and mobile fins). Lobe Finned: • Fins are long, fleshy, muscular, supported by central core of bones. • Thought to be ancestors of amphibians. • Examples are: Coelacanth, Lungfish

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