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The name of a person that studies fish is a ichthyologists. The main three classes of fish are Agmatha, Chondrichthyes, and Osteichthyes.

The major parts of the digestive system is the liver, gallbladder, esophagus, and stomach. The major parts of the nervous system is the olfactory lobes, cerebrum, optic lobes, cerebellum, medula, and spinal cord. The parts of the circulatory system are peritoneal cavity, heart, ventricle, atrium, sinus venosus, ventral aorta, conus arteriosus, afferent branchial hearts. arteries, and efferent branchial arteries. Parts of the reproductive system is the mesentary, testes, and ovary.

All fish reproduce sexually. Some fish do it by fertilization, while others do it by external fertilization.

Some diseases fish get are gill fungus and tail rot.

Bibliography

  1. "Fish," World Book Encyclopedia 1998 Multimedia Encyclopedia., 1998.
  2. "fish (animal)," The New Groiler Multimedia Encyclopedia., 1994.
  3. "Nasco's Dissection Guide For the Perch," Fort Atkinson, Wisconsin, Nasco, 1981.

Fish © 1998 Jacob Eapen.