Osteichthyes General Characteristics and Examples | Free Biology Notes

Osteichthyes General Characteristics

Osteichthyes General Characteristics and Examples

After reading this article you will learn about Osteichthyes General Characteristics and Examples

Osteichthyes General Characteristics

  • Fresh water or marine
  • Endoskeleton mostly bony. Expect the sturgeons.
  • Skin usually covered with scales but placoid scales absent
  • Gill slits covered by operculum
  • Air bladder present
  • Spiral valves absent in intestine
  • Males without claspers, fertilization is external.
  • They are oviparous

Osteichthyes Examples

Labeo rohita (rohu)

  • Found in fresh water
  • This fish serves as a popular delicious fish

Hippocampus (sea horse)

  • The male bears brood pouch in which female lays eggs and remain there till they hatch
  • Parental care is performed by male

Exocoetus (flying fish)

  • The pectoral fins are modified into wing-like structures, with the help of which the fish glides.

Anguilla (fresh water eel)

  • It has a long snake like body
  • Adult male and female fishes migrate from river to sea where they lay eggs and die. (catadromous migration)
  • The young which hatches from egg is called leptocephalus (larva of eel)
  • Larvae are so transparent that they are called glass fishes
  • They feed and grow in sea for 2 or 3 years, then enter the river and undergo metamorphosis to become adults

Gambusia (mosquito fish)

  • It feeds on the mosquito larvae
  • Widely used to control mosquito

Tenualosa (hilsa)

  • It is a very popular food fish in the Indian
  • Adult male and female fishes migrate from sea to river where they lay eggs and die. (anadromous migration)

Prototerous (African lung fish)

  • Gills are weakly developed
  • Respiration is supplemented with two lungs
  • It undergoes aestivation during summer season

Latimeria (Coelacanth)

  • It is a living fossill which was taken off from the eastern coast of South Africa
  • It is believed that crossopterygians (fleshy finned fish) were the ancestors of the first amphibians
  • It is a connecting link between fishes and amphibians.

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