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Heterocercal caudal fin - PowerPoint PPT Presentation

Chondrichthyes

Chondrichthyes. Hydrodynamics. Body shape Sharks typically have an elongate fusiform body (rounded and tapering at both ends). This body shape reduces drag and requires a minimum of energy to swim. Swimming is essential for buoyancy. Caudal Fin = Propulsion.

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323 views • 16 slides

Petromyzontidae (lampreys)

Petromyzontidae (lampreys). Jawless 7 gill apertures No paired fins (pectoral, pelvic anal) Cartilaginous skeleton. American brook lamprey ( Lampetra appendix ). Petromyzontidae. Adults usually fish predator/parasites Sea lamprey adversely affected Great Lakes fishery

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151 views • 11 slides

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Heterocercal caudal fin - PowerPoint PPT Presentation

Chondrichthyes

Petromyzontidae (lampreys)