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Published byVivien Joleen Walters Modified over 9 years ago
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ChondrichthyesChondrichthyes By: Krissie & Elisabeth Rays Skates - Lack venomous spines
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Characteristics: Cartilaginous = no bone Some have barbs (rays) Most have 5-7 gill slits Paired fins & nostrils Have Scales & a Jaw Sharks Most sharks have heterocercal tail = Helps to move
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Whats for Dinner? Sharks: Carnivorous o all sea animals/ some strain plankton Chimaeras: Bottom dwelling o crabs, clams, and fishes Skates & Rays: Bottom dwelling o shell animals & bony fishes
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Something Cool!!!Something Cool!!! Sharks loose up to 30,000 teeth in a life time. o Rely on their oily liver for buoyancy & move constantly to not sink. Chimaeras
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Phyla Kingdom:AnimaliaAnimalia Phylum:ChordataChordata Subphylum:VertebrataVertebrata Infraphylum:Gnathostom ataGnathostom ata Class:Chondrichthyes
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Reproduction OVIPAROUS: LIKE FISH -- EXTERNAL FERTILIZATION OF EGGS OVOVIVIPAROUS: EGGS KEPT IN MOTHER AND HATCH WITHIN MOTHER -- EGG HATCHES IN BODY - ENERGY FOR EMBRYO SUPPLIED BY YOLK ( INTRA-UTERINE CANNIBALISM SEEN IN THE SAND TIGER SHARK WHERE THE FIRST BORN DEVOURS THE OTHER EMBRYOS ) VIVIPAROUS: PLACENTAL CONNECTION VIA UMBILICAL CORD
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Symmetry Bilateral Symmetry
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10 Examples Dog Fish Electric Ray Saw Fish Hammer-headed Shark Pomfret Cat Fish Salmon Globe Fish Eel Sea-horse
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