A Case We Might Endeavor

A large Koi (not really large but large) large enough to work on successfully

The koi has decent body language and comes from a healthy pond

The fish is close enough to be brought to you at the University of Georgia (packed correctly) which I will help ensure.

The fish has a large ‘swelling’ at the abdomen exactly at and around the vent. Anything could be wrong with the fish.

As you know, the reproductive tree and the urinary tract and the intestinal tract all terminate / empty here so a tremendous confluence of vital structures could be involved.

I have had two of these.

  1. One turned out to be a bullet casing the fish swallowed which made it past everything and lodged in the cloaca. Killing the fish.
  2. One turned out to be a pocket of inspissated pus. The “mass” was a large, all-encompassing structure composed of dry waxy yellow sheets of material. That “mass” was about 60mm in diameter. The fish got a surgery to remove the mass, the intestine was pexied / enterotomied to the abdominal wall. Even after the sutures dehisced, it was able to poop through the fistula. The intestine did heal to the peritoneum, belly wall. Success seemed possible. It died anyway. I am sure somewhere along in there, the patency of the ureter(s) was compromised and Ammonia excretion via the gills was inadequate, slowly killing it. Or who knows. Murphy’s law. Bad luck. Something that would be elementary to you or Noga, Lewbart hahahaha

These are videos of the fish. The body language is decent, the fish is losing weight however. Sometimes you get on these “in time” for surgical success but the fish will die of ‘awakened tuberculosis’ later. When they’re too far gone to begin with. I hate that.





Author: Dr. Erik Johnson
Dr. Erik Johnson is the author of several texts on companion animal and fish health. Johnson Veterinary Services has been operating in Marietta, GA since 1996. Dr Johnson graduated from the University of Georgia College of Veterinary Medicine in 1991. Dr Johnson has lived in Marietta Georgia since 1976.