fish designs
Post on 24-Feb-2016
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Fish Designs
Pectoral & Pelvic Fins
• Used 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
Increased Surface Area
• Although increases Thrust, it also increases Drag
• The efficiency of the design represented by:• Aspect ratio = fin height2/fin area
Heterocercal tailAR=7 to 10Gives lift (no swim bladder) and thrustBad at maneuvering
AR=5good for propulsion and fast maneuvering
AR=1At slow speeds good for maneuvering
AR=7 to 10Good for fast cruising bad for maneuvering
AR=3good for fast speeds and maneuvering
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.
Operculum
• a flap of the bony fish covering the gills
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