Fish morphology

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Fish morphology

  1. 1. Fish MorphologyGreat diversityexists amongfishes bodytypes and inadaptationsthey have thathelp themsurvive in theirenvironment
  2. 2. Body Shape - Fusiform• Streamlined, torpedo-shaped• Fast open water swimmers• Predators• Move tail side to side• Ex: Tuna, Swordfish, Shark,Striped Bass, Salmon
  3. 3. FusiformElfin Cove, AlaskaElfin Cove, AlaskaOrient Point, New YorkOrient Point, New York
  4. 4. Body Shape - Compressiform• Compressed from side toside• Quick bursts of speed overshort distances• Live among plants, moveamong narrow spaces• Move tail side to side• Ex: Moonfish, ButterflyfishFrontview
  5. 5. Body Shape - Depressiform• Flattened top to bottom• Live on the bottom• Predators or scavengers• Flap fins up and down,swim like a bird• Ex: Halibut, Flounder,Skates, RaysFrontview
  6. 6. Elfin Cove, AlaskaElfin Cove, Alaska Montauk, New YorkMontauk, New YorkCheck out tail shape Check out tail shapeDepressiform
  7. 7. Body Shape – Filiform (Attenuated)• Elongated shape• Slow• Live soft mud, sand, orunder rocks• Slither like a snake• Ex: Eels, Sand LanceSideview
  8. 8. Caudal Fin Shape• Caudal Fin = Tail• Homocercal = symmetrical• Heterocercal = asymmetrical
  9. 9. Tail Shape – Homocercal-Rounded• Large amount of surfacearea allows sharp turns,quick starts for predatoravoidance• Creates drag, fish tireseasily• Ex: Northern Puffer,Clownfish
  10. 10. Tail Shape – Homocercal-Truncate• Allows short bursts ofspeed to escape predatorsor constant slowswimming• Less drag than rounded• Bottom dwelling fish• Ex: Killifish, Flounder,Halibut (see slide 6)
  11. 11. Tail Shape – Homocercal-Forked• Allows constant swimmingover long distances,reduces drag• Open water swimmers• Don’t need speed forprotection or to catchfood• Ex: Many schooling fish,Menhaden, Striped Bass,Porgies
  12. 12. Huntington, NewYorkHuntington, NewYorkSmithtown, New YorkSmithtown, New YorkHomocercal-Forked
  13. 13. Tail Shape – Homocercal- Lunate• Half-moon shaped• Fast moving oceanicswimmers• Less drag, great acceleration,reduced maneuverability• Ex: Tuna, Swordfish
  14. 14. Tail Shape – Heterocercal• Medium speed• Asymmetrical – top longerthan bottom• No air bladder, so tail provideslift• Reduced maneuverability• Ex: Many sharks

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