class osteichthyes
DESCRIPTION
Class Osteichthyes. FISH. COLORATION. Iridophores and chromatophores: pigment cells Helps in species recognition for mating and territory. Parrotfish. WARNING COLORATION. Bright coloration alerts others that the fish is dangerous, poisonous, venomous or tastes bad. Garibaldi. Lionfish. - PowerPoint PPT PresentationTRANSCRIPT
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Class Osteichthyes
FISH
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COLORATION
• Iridophores and chromatophores: pigment cells
• Helps in species recognition for mating and territory
Parrotfish
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WARNING COLORATION
• Bright coloration alerts others that the fish is dangerous, poisonous, venomous or tastes bad.
Garibaldi
Lionfish
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CRYPTIC COLORATION
• May change color to blend in with surroundings
• Example: Flounder
Flounder
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FROGFISH
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DISRUPTIVE COLORATION• Presence of bars, stripes, or false eye
spots.
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MIMICRY• look like another animal
Marine Betta
Spotted Moray
Batfish
Flatworm
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COUNTERSHADING
• Light on the bottom, dark on the top
Great White Shark
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TAILS
• Rounded:
• Forked:
• Lunate:
Damsel
Tuna
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BODY SHAPE (adapted to environment)
Laterally Compressed
Dorsal/Ventrally Compressed
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FUSIFORM
• Very fast• Hydrodynamic
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ODD SHAPES
Trunkfish
Sea Horse
Puffer fish
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PELAGIC FISH ADAPTATIONS
1. Fusiform body = Hydrodynamic
2. Silver or countershading
3. Forked tail = FAST
4. Large pectoral fins
5. Finlets
6. Keel
Mola
Flying FishTuna
Barracuda
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CORAL REEF ADAPTATIONS1. Laterally
compressed or odd body shapes
2. Disruptive or warning coloration
3. Moderate to fast swimmers
Moray Eel
Grouper
Trumpet Fish
Boxfish
Butterfly Fish
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BENTHIC ADAPTATIONS
1. Flattened body
2. Cryptic coloration
3. Superior mouth
4. Superior eyes
5. Moderate to slow swimmers
Flounder
Sea Robin
Stargazer
Sculpin
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NIGHT ADAPTATIONS
1. Pale red to reddish brown
2. 2. Large eyes (tapetum lucidum)
3. May bioluminesce
Cardinalfish
Bigeye
Squirrelfish
Soldierfish
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REPRODUCTION
• Most fish spawn: external fertilization
• Anadromous: spawn in fresh water, spend life in salt (salmon)
• Catadromous: spawn in salt water, spend life in fresh (European eel)
• Oviparous or Viviparous• Many fish are
hermaphrodites: possess both ovaries and testes
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SCHOOLING
• Protection, safety in numbers, confuses predators
• Finding mates and food
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COELACANTH: Fossil Fish
• Lobed-finned fish. • Thought to be extinct, but discovered off the
coast of Sri Lanka in early part of 20th century.• Living fossil fish
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WHALE SHARK
• Largest Fish (up to 50ft.)
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SAILFISH
• Fastest fish; may swim up to 70 mph
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Paedocypris progenetica:
• World’s Smallest Fish
• 7.9 mm (.31in)• Lives in forest
swamps of Sumatra
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Vocabulary
• Nocturnal: Hunts at night
• Diurnal: Hunts during the day
• Crepuscular: Hunts at dawn and dusk