Fish Health - Mechanical Injuries

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The results of scratching from a fluke, parasite, or high nitrites. With secondary aeromonas infection.

Impact woundImpact wound

Impact wound

Preditor damageThis damage looks very similar to furunculosis, but this is predator damage or mechanical injury.

As you can see there is no secondary infection and was there an aeromonas infection.

A wound this size would have entered the gut wall and fish would have been completely immobile. This particular fish was caught by an angler.

Mechanical injuries with secondary infection of aeromonas hydrofiller.


Notice the stones?

Put nothing abrasive in with your koi or you will see consequences.


mechanical injury to fishmechanical injury to fish

Mechanical injuryThese are classic wounds from fish catching their body on slabs or copping stones which come into contact with the pond surface.
mechanical injuryDr. Lawrence,
We live in a small town in northern Nevada. Winter temps can go below freezing and summer temps can get to high 90's and low 100's. We bought 3, 12 inch koi from a pond store in Reno, Nevada and 4 smaller koi were given to us from a neighbor who bought them in California.One of the smaller koi died in March 07 when he got sucked into the skimmer for the pond and his tail fin got caught in the skimmer door. All koi were aquired the summer of 2006 so the summer of 2007 is the first cold to hot temp. mechanical injurychange they've gone through with us.Reading about khv, this seems to be the vulnerable time for koi. While doing our spring cleaning in 2007 we put all fish in a smaller tank and noticed one of the bigger koi swimming at the top and gasping for air. I picked him up and noticed 2 open sores on his belly. By the time we were done cleaning the pond, he was gone. A week later after keeping an eye on remaining fish we noticed another of our bigger koi had red patches on its side. We pulled him out and took pictures. So far he's still alive but he is a little lethargic and doesn't eat much, and we haven't seen any changes to the others yet. We'll be keeping an eye on the others and I'll send pictures as they are affected.
Thanks,
Michelle

mechanical injuryHi Michelle
Many thanks seeing your pics one BIG problem you have is your pond bottom never put stones slate etc on your pond bottom all your fishes wounds could be down to mechanical injuries see under health mechanical injuries this may not be k.h.v this may just be fish coming into contact with abrasive surfaces koi have no protection against such surfaces for the time being i will put your story and my reply under mechanical injuries please keep me up dated.
Regards
Lawrence

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