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Bony Fishes. Skeletal System is made out of bones. 95% of all fishes are bony fishes. Have scales and a mucous over the scale that protects them. Can use rings on fish scales (circuli) to tell the age of fish. Bony Fishes Classification. Kingdom: Animalia (Animal)
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Bony Fishes • Skeletal System is made out of bones. • 95% of all fishes are bony fishes. • Have scales and a mucous over the scale that protects them. • Can use rings on fish scales (circuli) to tell the age of fish.
Bony Fishes Classification • Kingdom: Animalia (Animal) • Phylum: Chordata (Chordate) • Sub Phylum: Vertebrata (Vertebrate) • Infra Phylum: Gnathostomata (Has A Jaw) • Class: Osteichthyes (Bony Fishes)
Characteristics of Osteichthyes • Breathe with gills. • Gills are covered by a membrane called operculum. • Use fins to swim… free swimming organisms are called nekton.
Bony Fish Physiology • Ecotothermic – body temperature is determined by environmental temperature. • Lower Temps = Low Metabolism • Use Swim Bladder to change buoyancy.
Bony Fish Reproduction • Reproduction called spawning. • Most fertilization is external.
Bony Fish Development • Life Cycle Has 5 Major Stages • 1. Egg Stage • 2. Larval Stage • 3. Pre-Juvenile Stage • 4. Juvenile Stage • 5. Adult Stage