Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal:...
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Transcript of Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal:...
![Page 1: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/1.jpg)
Introduction to Fish
![Page 2: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/2.jpg)
What makes a fish a fish?
![Page 3: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/3.jpg)
Jaws/ Mouths• Terminal:
Opens at midline
• Superior: Opens towards top of midline
• Inferior: opens downwards from midline
![Page 4: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/4.jpg)
Scales• Cycloid: Fish
with smooth fins• Ctenoid: Fish
with bristled fins• Ganoid:
Primitive fish (gar or sturgeon)
• Placoid: Skin teeth or dermal denticles (sharks and triggerfish)
![Page 5: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/5.jpg)
Gills• Respiration
(Oxygen & carbon dioxide exchange).
• Underneath gill openings, slits or operculum
![Page 6: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/6.jpg)
Fins• Dorsal (2):
Stabilization• Pectoral (2):
Steering & stopping
• Pelvic (2): Stabilization
• Caudal (1): Propulsion & steering
• Anal (1): Stabilization
![Page 7: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/7.jpg)
Swim Bladder• Buoyancy control• Some benthic
(bottom) fish do not have a swim bladder
• Sharks use their oily liver
![Page 8: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/8.jpg)
Lateral Line• Sensory for
touch• Fluid filled
bulbs that sense water around the fish
![Page 9: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/9.jpg)
There are 3 classes of fish
![Page 10: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/10.jpg)
Agnatha• Fish without jaws• No scales• 7-14 gill openings• Very primitive• Hagfish or Slime
Eel: marine fish, scavengers
• Lamprey: Parasitic freshwater fish.
![Page 11: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/11.jpg)
Chondrichthyes• Cartilage fish• Well-developed
jaws• 5-7 gill slits• Paired fins• Placoid scales• Sharks, skates,
rays and Chimaeras
![Page 12: Introduction to Fish. What makes a fish a fish? Jaws/ Mouths Terminal: Opens at midline Terminal: Opens at midline Superior: Opens towards top of midline.](https://reader036.fdocuments.us/reader036/viewer/2022062423/5697c02d1a28abf838cd9b1e/html5/thumbnails/12.jpg)
Osteichthyes• Bony Fish• Paired fins• Gill cover
(Operculum)• Most have
scales• Tuna, damsels,
triggerfish, etc.