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Osteichthyes

Osteichthyes. Bony Fish At least some bone in their skeleton and/or scales. Operculum – Cover for the gill openings. Some have lungs Swim Bladders to adjust depth in the water. 24,000 species. Two classes: Sarcopterygii – Lungfish and Coelacanths Actinopterygii – Ray finned fish.

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Osteichthyes

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  1. Osteichthyes Bony Fish At least some bone in their skeleton and/or scales. Operculum – Cover for the gill openings. Some have lungs Swim Bladders to adjust depth in the water. 24,000 species. Two classes: Sarcopterygii – Lungfish and Coelacanths Actinopterygii – Ray finned fish

  2. Classification so far.

  3. Class Sarcopterygii Paired fins with muscular lobes – Help with walking in lungfish. Lungs – Pneumatic sacs Partially divided atria and ventricles – not as much mixture with blood. Examples: Lungfish and Coelacanths

  4. Class Actinopterygii Paired Fins with dermal rays. Not attached to main muscles. Tail fin equal at top and bottom. Pneumatic sacs used as swim bladder rather than lungs. Ray fins. Ex. Various: Perch, Bass, Lionfish, and even Oscar. Enormous Fish Movie

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