Ls 12 2 Fishes

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Information about Ls 12 2 Fishes

Published on February 12, 2009

Author: mrsjorgenson224

Source: slideshare.net

Description

Lecture over the characteristics of fish and the three types of fish: jawless, cartilaginous, and bony.

12-2 Fishes Life Science

What is a Fish? Fish Characteristics Fins Lives in water Most are ectotherms Obtain oxygen through gills (from water) Have scales

Fish Characteristics

Fins

Lives in water

Most are ectotherms

Obtain oxygen through gills (from water)

Have scales

Dogfish Fins

 

Gills

Gills

Fish have a closed circulatory system.

 

Fish Scales

 

Male & Female fish with fertilized eggs most fish fertilized eggs outside the mother's body

3 Types of Fishes Jawless Fishes Hagfish & lampreys Cartilaginous Fishes Sharks, rays, skates Bony Fishes 95% of all fish species are bony fishes Jaws, scales, pockets for gills, skeleton, swim bladder

Jawless Fishes

Hagfish & lampreys

Cartilaginous Fishes

Sharks, rays, skates

Bony Fishes

95% of all fish species are bony fishes

Jaws, scales, pockets for gills, skeleton, swim bladder

Jawless hagfish no jaws no scales

Jawless hagfish no jaws no scales

Jawless lamprey no jaws no scales feed on other fishes

Jawless lamprey no jaws no scales feed on other fishes

 

Cartilaginous fishes Tiger Shark characteristics: jaws scales skeletons made of cartliage

shark scales

Cartilaginous fishes

Q&A: How do sharks get oxygen?

Difference between a stingray and skate? Skates do not posses venomous barbs Skates primarily live in marine habitats and rarely enter freshwater environments Stingrays give birth to live young while skates reproduce by laying eggs in leathery capsules

Skates do not posses venomous barbs

Skates primarily live in marine habitats and rarely enter freshwater environments

Stingrays give birth to live young while skates reproduce by laying eggs in leathery capsules

Cartilaginous Fishes Ray Ray Skate

Cartilaginous fishes

Cartilaginous fishes skate

Bony Fish = 95% of fish

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