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
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
CRYPTIC COLORATION
• May change color to blend in with surroundings
• Example: Flounder
Flounder
FROGFISH
DISRUPTIVE COLORATION• Presence of bars, stripes, or false eye
spots.
MIMICRY• look like another animal
Marine Betta
Spotted Moray
Batfish
Flatworm
COUNTERSHADING
• Light on the bottom, dark on the top
Great White Shark
TAILS
• Rounded:
• Forked:
• Lunate:
Damsel
Tuna
BODY SHAPE (adapted to environment)
Laterally Compressed
Dorsal/Ventrally Compressed
FUSIFORM
• Very fast• Hydrodynamic
ODD SHAPES
Trunkfish
Sea Horse
Puffer fish
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
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
BENTHIC ADAPTATIONS
1. Flattened body
2. Cryptic coloration
3. Superior mouth
4. Superior eyes
5. Moderate to slow swimmers
Flounder
Sea Robin
Stargazer
Sculpin
NIGHT ADAPTATIONS
1. Pale red to reddish brown
2. 2. Large eyes (tapetum lucidum)
3. May bioluminesce
Cardinalfish
Bigeye
Squirrelfish
Soldierfish
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
SCHOOLING
• Protection, safety in numbers, confuses predators
• Finding mates and food
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
WHALE SHARK
• Largest Fish (up to 50ft.)
SAILFISH
• Fastest fish; may swim up to 70 mph
Paedocypris progenetica:
• World’s Smallest Fish
• 7.9 mm (.31in)• Lives in forest
swamps of Sumatra
Vocabulary
• Nocturnal: Hunts at night
• Diurnal: Hunts during the day
• Crepuscular: Hunts at dawn and dusk