What is a Fish?
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Transcript of What is a Fish?
What is a Fish?
Classification
• Kingdom- Animalia• Phylum- Chordata• Sub Phylum- Vertebrate• Classes- Jawless, Cartilaginous & Bony Fishes
Characteristics of Fishes:
1. all Vertebrates2. all live in water3. obtain oxygen
through gills4. have fins5. most are ectotherms6. MOST have scales
* Laminid- endothermic shark
Let’s go to the Video!https://www.youtube.com/watch?v=IN7ISLbOhGo
https://www.youtube.com/watch?v=Zoygy-8PTtU barreleye For the first time, a large Pacific barreleye fish - complete with transparent head - has been caught on film by
scientists using remotely operated vehicles at the Monterey Bay Aquarium Research Institute. The deep-sea fish's tubular eyes pivot under a clear dome.
3 Major Groups of
Fishes
1. JAWLESS FISHJawless fish: Lampreys, Hagfish
Types of JAWLESS FISH• Hagfish- Ocean
scavengers, eat dead & decaying bodies
• Lamprey- fresh and salt water, they are parasitic and prey on other fish.
* Both have skeletons made of cartilage and sucker-like mouths.
Characteristics of Jawless Fish
• NO jaws– instead have mouths
used for scraping, stabbing, and sucking food
• NO scales
A Sliming Hagfishhttps://www.youtube.com/watch?v=6DlWftios0s
The Sea Lamprey
Sea Lamprey Video Clip
https://www.youtube.com/watch?v=-SYhOD1Yx10
2. Cartilaginous Fish: Sharks, Rays, & Skates
Charateristics of Cartilaginous Fishes
1.Have Jaws2.Have Scales- pointed & toothlike3.Skeletons made of Cartilage4.MOST have live Birth5.Carnivores
Sharks, Skates & Rays
• Sharks and Rays- can’t pump water over gills and must keep moving to breathe.
Skates vs Rays• Skates - egg
laying• Rays- Live
Birth• Skates -
larger dorsal fin
• Rays- Larger than skates
Shaaaaaaark!!!!!
More Shark Attacks??????
They get a Bad Rap :-(
3. Bony Fishes• Bony Fish:
Salmon, Carp, Tuna
• Over 20,000 different species
• 95% of all fish species
Characteristics of Bony Fish….
1. Has jaws2. Has scales3. Pocket on each side of head to
hold gills4. Skeleton of Hard Bones5. Swim Bladder 6. Fins
Swim Bladder• internal balloon-like organ - filled
with gas• helps fish stay stable at different
depths of water using less energy
Fish Respiration• Water flows over
Gills as fish opens mouth and swims.
• Oxygen diffuses from the water into the blood.
Up Close and Personal
Function of the Gills
Types of Bony FishesRay Finned:
– Most fish are this type– Fins are supported by bony
structures called Rays.
Lobe Finned:– Fins are long, fleshy, muscular,
supported by central core of bones.– Thought to be ancestors of
amphibians.– Examples are: Coelacanth, Lungfish
Bizarre Bony Fishhttps://www.youtube.com/watch?v=kZuVyPRhFME
Bizarre Fish the Sequel
Fish Anatomy
Fins
Different Dorsal Fins