Fishes Kingdom-Animalia Phylum- Chordate (Notocord- at some point can turn into a backbone) Class-...
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Transcript of Fishes Kingdom-Animalia Phylum- Chordate (Notocord- at some point can turn into a backbone) Class-...
![Page 1: Fishes Kingdom-Animalia Phylum- Chordate (Notocord- at some point can turn into a backbone) Class- Jawless Cartilage Bony.](https://reader034.fdocuments.in/reader034/viewer/2022051215/5697bf811a28abf838c851d6/html5/thumbnails/1.jpg)
Fishes
Kingdom-Animalia
Phylum- Chordate (Notocord- at some point can turn into a
backbone)
Class- Jawless Cartilage
Bony
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Jawless Fish
• All Jawless fish do not have Scales – they have slimy skin and no fins
• Lampreys- are Parasites- animals that feed off another animal and do harm to that animal
• - live in fresh and salt water – They have teeth
• Hagfish- are Scavengers- they feed off of dead or dying animals . They are also blind. – live only in salt water – no teeth, they have tentacles
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Class-Jawless
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Hagfish Lamprey
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Lamprey
Notice the teeth and suckerlike mouth
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Cartilaginous Fish
• Rays Sharks
Skates
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Cartilaginous
• All have Placoid scales which are also, called Denticles. If rubbed from front to back it feels smooth. If rubbed back to front it feels like sandpaper.
![Page 8: Fishes Kingdom-Animalia Phylum- Chordate (Notocord- at some point can turn into a backbone) Class- Jawless Cartilage Bony.](https://reader034.fdocuments.in/reader034/viewer/2022051215/5697bf811a28abf838c851d6/html5/thumbnails/8.jpg)
• Pectoral Fins- located on sides of body and are used to change direction and for gliding in the water. It also helps prevent sinking . In Rays they are huge and used for swimming.(7meter span in rays) In sharks they are stiff.
• Dorsal and Ventral Fins- located on top and bottom of animal. Used for balance.
• Caudal Fin- along with its tail in sharks is strong and moves the fish at great speed.
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• Acute sense of smell. It can detect a drop of blood nearly half kilometer away.
• • They have a lateral line located on their
sides to sense movements in the water.
• They also have nerve receptors called ampullae of Lorenzini- senses electric fields generated by muscles of fish.
Dots aroundThis sharks mouth are ampullae
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• Do not have a swim bladder instead they have an oily liver that helps with bouancy which is less dense
• Breathing holes called spiracles located behind each eye. These are needed because most of these fish have gills on the underside of their bodies.
• Mostly all cartilaginous fish have mouths on ventral surface. This was an adaptation for bottom feeding even though most sharks are not bottom feeders. Skates and Rays are though.
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Notice the gills on the ventral surface
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Shark teeth Constantly being replaced
Mako shark
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![Page 14: Fishes Kingdom-Animalia Phylum- Chordate (Notocord- at some point can turn into a backbone) Class- Jawless Cartilage Bony.](https://reader034.fdocuments.in/reader034/viewer/2022051215/5697bf811a28abf838c851d6/html5/thumbnails/14.jpg)
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Sting Ray
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Manta Ray
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Skate
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• YouTube – Stingray
• YouTube - Manta ray dance
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Bony fish
» Striped bass