What is a Fish?

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What is a Fish?

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What is a Fish?. Classification. Kingdom- Animalia Phylum- Chordata Sub Phylum- Vertebrat e Classes- Jawless , Cartilaginous & Bony Fishes. Characteristics of Fishes :. all Vertebrates all live in water obtain oxygen through gills have fins most are ectotherms - PowerPoint PPT Presentation

Transcript of What is a Fish?

Page 1: What is a Fish?

What is a Fish?

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Classification

• Kingdom- Animalia• Phylum- Chordata• Sub Phylum- Vertebrate• Classes- Jawless, Cartilaginous & Bony Fishes

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Characteristics of Fishes:

1. all Vertebrates2. all live in water3. obtain oxygen

through gills4. have fins5. most are ectotherms6. MOST have scales

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* Laminid- endothermic shark

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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.

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3 Major Groups of

Fishes

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1. JAWLESS FISHJawless fish: Lampreys, Hagfish

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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.

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Characteristics of Jawless Fish

• NO jaws– instead have mouths

used for scraping, stabbing, and sucking food

• NO scales

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A Sliming Hagfishhttps://www.youtube.com/watch?v=6DlWftios0s

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The Sea Lamprey

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Sea Lamprey Video Clip

https://www.youtube.com/watch?v=-SYhOD1Yx10

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2. Cartilaginous Fish: Sharks, Rays, & Skates

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Charateristics of Cartilaginous Fishes

1.Have Jaws2.Have Scales- pointed & toothlike3.Skeletons made of Cartilage4.MOST have live Birth5.Carnivores

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Sharks, Skates & Rays

• Sharks and Rays- can’t pump water over gills and must keep moving to breathe.

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Skates vs Rays• Skates - egg

laying• Rays- Live

Birth• Skates -

larger dorsal fin

• Rays- Larger than skates

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Shaaaaaaark!!!!!

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More Shark Attacks??????

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They get a Bad Rap :-(

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3. Bony Fishes• Bony Fish:

Salmon, Carp, Tuna

• Over 20,000 different species

• 95% of all fish species

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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

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Swim Bladder• internal balloon-like organ - filled

with gas• helps fish stay stable at different

depths of water using less energy

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Fish Respiration• Water flows over

Gills as fish opens mouth and swims.

• Oxygen diffuses from the water into the blood.

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Up Close and Personal

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Function of the Gills

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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

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Bizarre Fish the Sequel

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Fish Anatomy

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Fins

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Different Dorsal Fins