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Related Experiment Video

Updated: Jun 21, 2026

Necropsy-based Wild Fish Health Assessment
07:57

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Published on: September 11, 2018

Fish-induced keriorrhea.

Ka Ho Ling1, Peter D Nichols, Paul Pui-Hay But

  • 1Food and Drug Authentication Laboratory, Department of Biology, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, PR China.

Advances in Food and Nutrition Research
|July 15, 2009
PubMed
Summary
This summary is machine-generated.

Consuming escolar and oilfish can cause keriorrhea, an oily discharge due to indigestible wax esters. Rapid detection of these deep-sea fish is crucial for public safety and proper food labeling.

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Area of Science:

  • Marine Biology
  • Food Safety
  • Toxicology

Background:

  • Deep-sea fish like escolar and oilfish store wax esters for buoyancy.
  • These fish are often caught as by-catch, increasing human exposure risk.
  • Wax ester accumulation in the rectum causes keriorrhea, colloquially known as 'oily diarrhea'.

Purpose of the Study:

  • To highlight the phenomenon of keriorrhea caused by escolar and oilfish consumption.
  • To emphasize the need for rapid identification methods for these fish.
  • To inform public health strategies regarding potential outbreaks.

Main Methods:

  • Literature review on deep-sea fish, wax esters, and keriorrhea.
  • Analysis of reported outbreaks and symptoms.
  • Examination of regulatory actions taken by different countries.

Main Results:

  • Keriorrhea is a distinct physiological response to consuming fish high in wax esters.
  • Escolar and oilfish are identified as primary culprits, leading to widespread reports.
  • Symptoms include oily discharge, nausea, vomiting, and abdominal discomfort.

Conclusions:

  • Escolar and oilfish pose a public health risk due to keriorrhea.
  • Bans on import and sale exist in several countries, indicating the severity of the issue.
  • Developing rapid detection methods is essential for preventing future outbreaks and ensuring consumer safety.