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Class Osteichthyes

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.

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Class Osteichthyes

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  1. Class Osteichthyes FISH

  2. COLORATION • Iridophores and chromatophores: pigment cells • Helps in species recognition for mating and territory Parrotfish

  3. WARNING COLORATION • Bright coloration alerts others that the fish is dangerous, poisonous, venomous or tastes bad. Garibaldi Lionfish

  4. CRYPTIC COLORATION • May change color to blend in with surroundings • Example: Flounder Flounder

  5. FROGFISH

  6. DISRUPTIVE COLORATION • Presence of bars, stripes, or false eye spots.

  7. MIMICRY Batfish Marine Betta • look like another animal Spotted Moray Flatworm

  8. COUNTERSHADING • Light on the bottom, dark on the top Great White Shark

  9. TAILS Damsel • Rounded: • Forked: • Lunate: Tuna

  10. BODY SHAPE (adapted to environment) Dorsal/Ventrally Compressed Laterally Compressed

  11. FUSIFORM • Very fast • Hydrodynamic

  12. ODD SHAPES Trunkfish Sea Horse Puffer fish

  13. PELAGIC FISH ADAPTATIONS Mola Barracuda • Fusiform body = Hydrodynamic • Silver or countershading • Forked tail = FAST • Large pectoral fins • Finlets • Keel Tuna Flying Fish

  14. CORAL REEF ADAPTATIONS • Laterally compressed or odd body shapes • Disruptive or warning coloration • Moderate to fast swimmers Boxfish Moray Eel Grouper Trumpet Fish Butterfly Fish

  15. BENTHIC ADAPTATIONS Sculpin Sea Robin • Flattened body • Cryptic coloration • Superior mouth • Superior eyes • Moderate to slow swimmers Flounder Stargazer

  16. NIGHT ADAPTATIONS Cardinalfish Squirrelfish • Pale red to reddish brown • 2. Large eyes (tapetum lucidum) • May bioluminesce Bigeye Soldierfish

  17. 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

  18. SCHOOLING • Protection, safety in numbers, confuses predators • Finding mates and food

  19. 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

  20. WHALE SHARK • Largest Fish (up to 50ft.)

  21. SAILFISH • Fastest fish; may swim up to 70 mph

  22. Paedocypris progenetica: • World’s Smallest Fish • 7.9 mm (.31in) • Lives in forest swamps of Sumatra

  23. Vocabulary • Nocturnal: Hunts at night • Diurnal: Hunts during the day • Crepuscular: Hunts at dawn and dusk

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