1. Fish

2. Classification
• Kingdom- Animalia
• Phylum- Chordata
• Classes- Agnatha,
Chondrichthyes,
Osteichthyes

3. Agnatha
Jawless fish: Lampreys, Hagfish

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TYPES OF FISH
Jawless fish: lamprey and hagfish
Lamprey is a parasite, it attaches to
other fish and sucks their blood
Hagfish is a scavenger, it lives in the
ocean and is known for its slimy
secretions

5. Types of Agnathans
• Hagfish- Ocean
scavengers, not much is
known about them.
• Lamprey- fresh and salt
water, they are parasitic
and prey on other fish.
* Both have cartilaginous
skeletons and sucker-like
mouths.

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• Sea Lamprey
• Possible Control?

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8. A Sliming Hagfish
QuickTime™ and a
decompressor
are needed to see this picture.
Class question: Why do you think it does this?
A Shark & A Hagfish
Hagfish Slime Makes Super Clothes

9. Chondrichthyes
Cartilaginous Fish: Shark, Ray

10. Types of Chondrichthyes
• Sharks and Rays-
have no operculum and
must keep moving to
breathe.
• Have different kinds of
scales that feel and look
more like sandpaper.
• Have skeletons made of
cartilage not bones.

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13. Chondrichthyes
• Sharks are adapted for a predatory
lifestyle.
• Cartilage skeletons, stiff pectoral fins
(speed).
• No operculum, must keep moving to
breathe.
• Have live births.
• Special scales feel like sandpaper.
• Manta, and Sting Rays- live in shallow
water, have mouths located on the
underside, are fairly docile, wide flat
bodies and wing-like fins that are
flexible.

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SHARKS
*The pectoral fins of sharks do not
move
* Sharks do not have an operculum
or a swim bladder
*sharks will sink if they stop
swimming

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Basking Shark is a filter feeder

20. Osteichthyes
Bony Fish:
Salmon,
Carp, Tuna
Over 20,000
different
species

21. Fish Characteristics
• Gills
• Backbone (vertebrae)
• Paired Fins
• Single Loop Circulation
• Two chambered heart

22. Types of Osteichthyes
Ray Finned:
– Most fish are this type
– Fins are supported by bony
structures called Rays.
– Teleosts are the most advanced
form of ray finned fish (symmetrical
tails and mobile fins).
Lobe Finned:
– Fins are long, fleshy, muscular,
supported by central core of bones.
– Thought to be ancestors of
amphibians.
– Examples are: Coelacanth, Lungfish

23. Fish Anatomy

24. Fins

25. Different Dorsal Fins

26. Fish Adaptations
• Lateral Line System- used to detect
vibrations, orient the fish in water, it is a line
of cells running down the side of the fish.
• Operculum- gill cover, movement of
operculum allows more water to be drawn in.
• Swim Bladder- a gas filled sac that helps
the fish maintain buoyancy. Sharks don’t
have a swim bladder!
• Fins- Dorsal, Caudal, Pectoral, Pelvic, Anal.

27. Adaptations
Air Bladder Operculum Lateral
Gills Line
Fins

28. Fish Respiration
• Water flows over Gills as fish
opens mouth and swims.
• Water flows opposite direction of
blood flow.
• O2 diffuses from the water into
the blood.
• Gills are made of thousands of
gill filaments.
• Gills are covered by the
Operculum.

30. Fish Circulation
• Fish heart has 2 chambers
• Single loop circulation
• Blood flows into gills, picks up O2, goes
to the body, returns to the heart.

31. Fish Reproduction
• Most Fish reproduce sexually, and fertilize
their eggs externally (Sharks-internally).
• Spawning is the process of fertilizing eggs.
• Baby fish are called FRY.

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Coelacanth: living fossil, lobe-finned

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Cichlids

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Clown Fish (Nemo)

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Kissing Fish

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The puffer fish uses air to expand its body
to look intimidating to predators

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Fugu (Japan): Despite precise preparation by specially qualified
chefs, this toxic puffer fish delicacy kills people every year.The
emperor of Japan isn't allowed to eat fugu lest it be his last
meal. For all that work and risk, it still tastes like fish, but many
people
respect the chefs.

42. Just Amazing!!!!
QuickTime™ and a
decompressor
are needed to see this picture.