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Fish Designs

Fish Designs. Pectoral & Pelvic Fins. U sed to turn, brake and balance the fish. Dorsal and Anal fins. Vertical fins used as stabilizers. Adipose Fin. Caudal fin. Used in propulsion in high speed fish. Caudal Fin. Can increase vertically to increase surface area to develop thrust.

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Fish Designs

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  1. Fish Designs

  2. Pectoral & Pelvic Fins • Used to turn, brake and balance the fish

  3. Dorsal and Anal fins • Vertical fins used as stabilizers

  4. Adipose Fin

  5. Caudal fin • Used in propulsion in high speed fish

  6. Caudal Fin • Can increase vertically to increase surface area to develop thrust

  7. Increased Surface Area • Although increases Thrust, it also increases Drag • The efficiency of the design represented by: • Aspect ratio = fin height2/fin area Heterocercal tail AR=7 to 10 Gives lift (no swim bladder) and thrust Bad at maneuvering

  8. AR=1 At slow speeds good for maneuvering AR=5 good for propulsion and fast maneuvering AR=3 good for fast speeds and maneuvering AR=7 to 10 Good for fast cruising bad for maneuvering

  9. Lateral Line • The lateral line is a system of sense organs found in aquatic vertebrates, mainly fish, used to detect movement and vibration in the surrounding water.

  10. Operculum • a flap of the bony fish covering the gills

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