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

For our research minded members, what a great article on the science of genetics of the pigmentation in koi.  Enjoy!
 

A short article on the names of the color variations on koi, along with pictures. 
 
Koi is the general name for “carp” in Japanese. The name refers to all types of carp, from the simple dull gray fish to highly colored varieties.

Share this with the kids, it is wonderful short video of hatching koi eggs. 
 
Koi Egg & Fry Development - Cuttlebook Koi Farm - YouTube

An amazing look at fertilized koi eggs!  This 1 1/2 minute YouTube is worth your time. 
 
Koi eggs 46 hours after fertilisation - Yoshikigoi Farm, Poland - YouTube

From PBS, you will enjoy this scientific exploration of fossils and why there are no squids!
They recently discovered why there are octopus fossils, but no squid fossils.  Turns out that squid can retain exhaled ammonia and use it to compensate buoyancy - and because the retained ammonia changes the pH of their tissues, it doesn't fossilize at all well.  Note that it's the ammonia that Koi breath out that lowers the pH of the bag water when shipping and allows the Koi to survive. Interesting adaptations of different aquatic species and ammonia!
 

A reminder to never release any pet fish into a river, stream or lake. 
 
ROBBINSDALE, Minn. — Creatures of the night vary at Crystal Lake in Robbinsdale, and on Tuesday night going into Wednesday morning, the party included humans.

Jordan Wein and his team from WSB, an environmental consulting firm, geared up for the hunt. They put on waders and sprayed themselves down with bug spray.

A great overview of the history of keeping goldfish along with interesting facts.  
 
About four million households in the UK own fish, which equates to roughly 14% of the population, according to the Ornamental Aquatic Trade Association. Attractive, colourful, easy on the eye and calming, ornamental fish offer a low maintenance alternative to cats and dogs and even spare your furniture.
 

How do they figure these things out?
 

Life through a fisheye lens: Fascinating images show how your pets see your surroundings at home

Okay, now I am carefully looking out for red eyed carp.  Do you have one?  
 
The purpose of this study was to investigate the inheritance of red eyes in ornamental koi, a variant of Common Carp Cyprinus carpio. The study included crossing fish with different eye color phenotypes and analyzing fish segregations in progenies.
 
Gomelsky et al. 2016 NAJA 78 251-258.pdf (ksuaquaculture.org)
 
 
 

A very unigue carp indeed. 
 
An “extremely rare strain of carp,” a 13-pound mirror carp nicknamed tiger carp for its unique stripes, was the object of a bidding war recently among Britain fisheries, all vying to become the owner of the fish that is believed to be the first of its kind in the U.K.
 
‘Extremely rare’ fish sold at auction for $3,425 (usatoday.com)

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