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FISH

FISH. Phylum Chordata. Vertebrates. Internal skeletons. Animals which have a spinal cord protected by a backbone. Fish, amphibians, reptiles, birds & mammals. The fish. Live in water. Gills for gas exchange. Fins for locomotion. Skeleton made of cartilage or bone.

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FISH

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  1. FISH

  2. Phylum Chordata Vertebrates Internal skeletons Animals which have a spinal cord protected by a backbone Fish, amphibians, reptiles, birds & mammals

  3. The fish Live in water Gills for gas exchange Fins for locomotion Skeleton made of cartilage or bone Most are covered by scales Cold-blooded – body temp. depends on environment

  4. 3 classes of fish 1. Jawless fish - agnatha Oldest group – very primitive Scale-less skin Some Parasitic / some filter feed Circular mouth with fleshy teeth Cartilaginous skeleton

  5. Hagfish & lamprey Circular mouth Gill slits

  6. 3 classes of fish 2. cartilaginous fishcondrichthyes Skeleton made of cartilage Sharks, rays, skates All are predatory except 4 species!

  7. The 4 exceptions are filter feeders Whale sharks – warm shallow water THE LARGEST FISH IN THE SEA!!!

  8. The 4 exceptions are filter feeders Basking sharks – cold shallow water THE SECOND LARGEST FISH IN THE SEA!!!

  9. The 4 exceptions are filter feeders megamouth shark – cold deep water

  10. The 4 exceptions are filter feeders manta ray– shallow warm water

  11. 3 classes of fish 3. bony fish - osteichthyes Skeleton of bone Most numerous of fish species Greatest diversity in shape and feeding habits

  12. Body forms of fishes 1. fusiform Sharks, tuna, bluefish Streamlined, torpedo shaped Fast long distance swimmers Open water predators

  13. Body forms of fishes 2. compressed Perch, butterfly fish, angelfish Flattened laterally Quick bursts of speed - short distance Easily move in tight spaces

  14. Body forms of fishes 3. depressed Flounder, fluke, stingray Dorso-ventrally flattened Live on the bottom Eyes on top of body

  15. Body forms of fishes 4. attenuated Eels, lamprey, pipefish Elongated, tubular shape Many Live in holes / burrows Many secrete heavy mucus

  16. Body parts of fish Get ready to draw a fish!!!

  17. 1. Caudal fin - tail fin Used for forward motion and acceleration

  18. Singular fins 2. Dorsal fin & 3. Anal fin Used to prevent rolling/tipping

  19. paired fins (left & right) 4. pectoral fin & 5. pelvic fin Used to balance, stop & turn

  20. Used for protection 6. Spines Some contain poison sacs

  21. 7. operculum Covers & protects gills Not found in sharks

  22. 8. Lateral line Sensory canals used to detect changes in water pressure around the fish (similar to human ear)

  23. COMPARISON OF CARTILAGINOUS & BONY FISHES TRAIT CARTILAGINOUS BONY_____ TUNA, COD, SALMON, SHARKS, RAYS, SKATES EXAMPLES SKELETON CARTILAGE BONE ABSENT – OILYLIVER PROVIDES BUOYANCY PRESENT – AIR FILLED FOR BUOYANCY SWIM BLADDER

  24. COMPARISON OF CARTILAGINOUS & BONY FISHES TRAIT CARTILAGINOUS BONY_____ EXTERNAL – LAY MILLIONS OF SMALL EGGS INTERNAL – HAVE FEW LARGE YOUNG IN LIFE TIME FERTILIZATION GANOID – PLATELIKE CTENOID & CYCLOID ARE FLAT, FLEXIBLE, OVERLAP SCALES PLACOID–SPINY EMBEDDED IN SKIN

  25. COMPARISON OF CARTILAGINOUS & BONY FISHES TRAIT CARTILAGINOUS BONY_____ HAVE OPERCULUM COVER & PROTECT GILLS GILLS NO OPERCULUM HAVE GILLS SLITS FEEDING BEHAVIOR ALL PREDATORS FOUR EXCEPTIONS GREAT VARIATION IN FOOD SOURCES RIGID AND UNSEGMENTED FLEXIBLE AND SEGMENTED FINS TEETH NOT FUSED TO JAW -REPLACEABLE FUSED TO JAW - IRREPLACEABLE

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