Chapter 8 Marine Fish (Pg. 151) Phylum: Chordata Animals with a brain & spinal cord.

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Presentation transcript:

Chapter 8 Marine Fish (Pg. 151)

Phylum: Chordata Animals with a brain & spinal cord

Subphylum: Vertebrata Animals with a backbone or endoskeleton

Jawless Fish Class: Agnatha -most primitive fishes

Characteristics Jawless Have cartilage Sucking mouth Elongated body like eels Gill slits Meaty fins Do not need air

Examples Lamprey Eel Hagfish

Cartilaginous Fish Class Chondrichthyes -sharks, rays, skates, ratfishes

Characteristics Have cartilage = skin that is lighter & more flexible than bone Gill slits Ventral mouth (underneath head) Meaty fins Do not need air Placoid scales = pointed like teeth

Shark Facts Shark meat is eaten around the world Fished for oil Shark skin used for leather called “shagreen” & sandpaper Fins used for soup: has led to overfishing of sharks and a ban on shark finning

Why Sharks are Important Some sharks are filter feeders & feed on plankton Balance ecosystems by feeding on small prey that would otherwise take over

Rays and Skates Stingrays: Some live on the bottom = “demersal” Pectoral, wing-like fins Have whip-like tail with stinging, poisonous spines Electric rays can deliver shocks up to 200 volts (original shock therapy used by Greeks) Skates: Similar to rays in appearance Lack tail

A) Yellow stingray B) Manta Ray

Elephant Fish - Type of Ratfish