1. ChondrichthyesChondrichthyes By: Krissie & Elisabeth Rays Skates - Lack venomous spines

2. 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

3. 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

4. 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

5. Phyla Kingdom:AnimaliaAnimalia Phylum:ChordataChordata Subphylum:VertebrataVertebrata Infraphylum:Gnathostom ataGnathostom ata Class:Chondrichthyes

6. 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

7. Symmetry Bilateral Symmetry

8. 10 Examples Dog Fish Electric Ray Saw Fish Hammer-headed Shark Pomfret Cat Fish Salmon Globe Fish Eel Sea-horse