Fish Superpowers - Anatomy, Physiology, Evolution, Genetics, Koi Characteristics, Koi/Fish Welfare

A researcher in Germany is studying why fish sometimes smells 'fishy.'

Ancient southern China fish may have evolved prior to the 'Age of Fish.'  'Shield scale' fish may provide insight into the early evolution of jawed vertebrates.

As fins evolve to help fish swim, so does the nervous system.  Study shows that shape and mechanics of fish fins evolve in parallel with the sensory system, tuned to swimming behavior.

In schooling fish, collective movement emerges as a result of multiple social interactions between individuals.

Do you know what fins, barrels, epidermis, and gills are and what their functions are? Do you know that the cuticle layer is considered the first layer of defense against disease and parasites? Learning a Koi's anatomy and their functions could help you better care for your Koi through observation and behavior. 

External Anatomy

Skin - The top layer of skin is the epidermis which is covered with a layer of mucus which is a barrier to disease and parasites as well as aides is movement by reducing friction.

Did you know that if you are a K.O.I. member, you have access to one of the BEST Koi magazines ever produced?  Koi Health Quarterly was written by the Koi Health Group (a group of veterinarians concerned about Koi Health) from 1993 to 1997.  There are 16 amazing issues, each packed with specific information about Koi for the hobbyist Koi keeper.  This article in Iisue 9 is way ahead of it's time.  We recently reported on a book published in 2016 and concluded that fish do feel pain, but this little article was published over 20 years earlier! 

Read the story about what could be the oldest goldfish 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.


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


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