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Keywords:

  • anaesthetic;
  • cyanide;
  • gastrointestinal tract;
  • gut

The histological effects of cyanide, stress and starvation on the gastrointestinal tract of Pomacentrus coelestis, a common marine aquarium fish species, were investigated. Neither anaesthetic cyanide nor stress were found to have any detectable effects on the mucosal lining of the intestine. However, starvation resulted in a significant reduction in the intestine length, the surface area of the intestinal mucosa and the mucosal thickness, all occurring within 13 days.