class chondrichthyes

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Class Chondrichthyes • “Cartilaginous Fish” Skeleton made of cartilage Movable jaws with well- developed teeth Rough sand paper like scales made of the same composition of the teeth

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Class Chondrichthyes. “Cartilaginous Fish” Skeleton made of cartilage Movable jaws with well-developed teeth Rough sand paper like scales made of the same composition of the teeth. Sharks & Ratfish. Sharks Adapted for fast swimming and to be predators Ratfish or Chimeras Bottom dwellers - PowerPoint PPT Presentation

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Page 1: Class  Chondrichthyes

Class Chondrichthyes• “Cartilaginous Fish”• Skeleton made of

cartilage• Movable jaws with

well-developed teeth

• Rough sand paper like scales made of the same composition of the teeth

Page 2: Class  Chondrichthyes

Sharks & Ratfish

• Sharks– Adapted for fast

swimming and to be predators

• Ratfish or Chimeras– Bottom dwellers – Have long “rat-like” tails

Page 3: Class  Chondrichthyes

Rays and Skates

• Rays– Flattened bodies

with gills on the bottom of their bodies

– Whip-like tail with stinging spines (venomous)

• Skates– Very similar to rays

but with out the long tail or stinging spines

Page 4: Class  Chondrichthyes

Class Osteichthyes• “Bony Fish”• Make of 98% of all fish

and over half the vertebrates

• Skeleton at least made partially of bone

• Thin, flexible, overlapping scales

• Mouth located at end of body

• Presence of gas-filled sac called a swim bladder

Page 5: Class  Chondrichthyes

Body Shape

• Body shape is varied and linked to its lifestyle

• Fast swimmer need elongated bodies

Page 6: Class  Chondrichthyes

Body Shape

• Short, compressed bodies good for navigating tight places like reefs

• Bottom dwellers tend to have flattened shapes

Page 7: Class  Chondrichthyes

Body Shape

• Elongated shapes are need for life in narrow spaces• Some have less

generalized shapes

Page 8: Class  Chondrichthyes

Body Shape

• Some shapes are conducive to camouflage with their environment

Page 9: Class  Chondrichthyes

Exterior Layer