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Hello Koi Enthusiasts!

This blog is here to provide a spot for various things that do or might pertain to Koi. This stuff is intended for your entertainment, and is not meant to meet the stricter standards of our ebooks and courses, so use this info carefully and at your own risk. The short articles here may be descriptions of techniques that have proved effective, an introduction to new fish research, facts, graphs or just something FUN about fish! This information can be a springboard for your imagination and an entertaining place to learn something new. Information that was first published in Question of the Week can be found here.

The more we learn about Koi, the more FUN this hobby is - and we always say - if you're not havin' FUN, you're not doin' it right!

Koi Photo Contest Sponsored by Hikari, starting May 1, 2017.

What is the best way to cure Koi diseases?  Here are 6 steps that actually work!


It seems a Ghostie is a mis-fit or the right-fit Koi, it just depends who you ask. 

Many Koi meds claim they can solve a multitude of problems, but their ingredients are secret!

Fungus on eggs has long been the bane of Koi breeders, whether they be professionals in Japan, or home hobbyist breeders here in the USA.  Reat the article about current research on ways to prevent fungus.

What is the correct way to use antibiotics to treat fish diseases?  Read this article by Dr. Loh, The Fish Vet in Australia, and also learn what K.O.I. courses you can take to learn more.

My Koi have adopted the whole begging thing - you know - body half outta water, mouth open - all we need is a sign - pour food here!  Dunno who's picture this is - but the spoon thing is brilliant - no waste!  Wish I'd thought of that!

The pond-dwelling carp (Cyprinus carpio). Foreign strains of carp from the Eurasian continent have invaded many bodies of water within Japan, and native Japanese carp are becoming rare.  Read how they tell the 2 apart by clicking on the title.

A student asked this question about an alternative site for IM injections, and the answer from the Fish Vet is very interesting - and exactly what K.O.I. teaches!  Read more by clicking on the title or picture.

Read the story about what could be the oldest goldfish by clicking on the title or picture.

A new freshwater fish parasite was discovered in Japan.  Read about how they track it by clicking on the title or picture.

All fish, including our Koi are experts at evading danger by schooling and coordinating their movements..  Learn more about this evolutionary advantage by clicking on the picture or title.


Some guppies have a better sense of maths than others. It allows some to find the biggest shoal possible in which to be protected against predators, while others are better at choosing fruitful foraging ground. This is according to research conducted by Tyrone Lucon-Xiccato and Marco Dadda of the University of Padova in Italy in Springer's journal Behavioral Ecology and Sociobiology.  Read more by clicking on the title or picture.

Our Koi are symmetrical, but there are many asymmetrical fish.  How did assymmetrical fish evolve?  Read about the new study by clicking in the title or picture.

In a unique pairing of biology and neutron science, researchers from the Department of Energy's Oak Ridge National Laboratory have gained new insights into aquatic biochemistry using the otoliths of the lake sturgeon, Acipenser fulvescens.  Read more by clicking the title or picture.

It has long been known that fish have an internal magnetic compass that helps them navigate. But when do they develop that ability?  Read the article by clicking on the title or picture.

What is the cost of having a large brain?  Read the fascinating article by clicking on the title or picture.

This graphic compares the light spectrum visible to three South American cichlid species (left) with the spectrum visible to many African species (right). South American cichlids have visual systems adapted to the red-shifted light environment of murky Amazonian waters.  Credit: Daniel Escobar-Camacho

Recent research on Chichlids suggests that fish may have color vision.  Read the article by clicking on the title or picture.

Zebrafish learn to balance by darting forward when they feel wobbly, a principle that may also apply to humans, according to a study led by researchers at NYU Langone Medical Center.  Read the article by clicking on the title or picture.

Many Koi keepers and nearly all Koi farms occasionally treat for fish lice.  A new study shows how small residuals from that treatment can affect other species.  Read the article by clicking on the title or picture.

Over a two-year period the researchers went through about 50 bass, puncturing or fracturing hundreds of fish scales under the microscope, to try to understand their properties and mechanics better.  Read the findings and more about fish scales by clicking on the title or picture.

If you want to better understand ion exchange in Koi, take Professor Strange's excellent class onthe Physiology of Water Quality for Koi - #521 -

This study reflects new research on how fish control excess ions - read the article by clicking on the picture or title.

Photo Credit: Image courtesy of Kobe University

A Japanese research group has used a new technology that identifies multiple fish species populating local areas by analyzing DNA samples from seawater, and proved that this method is accurate and more effective than visual observation.  Read more by clicking on the title or picture.

Artist's reconstruction of Saccorhytus coronarius, based on the original fossil finds. The actual creature was probably no more than a millimeter in size.Credit: S Conway Morris / Jian Ha.  Read the article by clicking on the title or picture.

Koi jump, especially when they are moved from a large body of water to a small body of water.  but have you ever wondered how they developed the ability to jump?  Learn more by clicking ont he picture or title.


!If you're not havin' FUN, you're not doin' it right


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