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

Ever wonder how our Koi can manage in such a wide range of temperatures and pH, and find food in opaque water?  A new study shows that high genetic diversity is the key.

Ever wonder why are Koi are afraid of nets and so hard to catch?  Turns out it's an evolutionary advantage to be cautious.  New research supports the creation of more marine reserves in the world's oceans because, the authors say, fish can evolve to be more cautious and stay away from fishing nets.

Here's one fish you may not want to keep in your saltwater aquarium!  This fish deals with predaturs by biting them with opiod-laced venom.

Two male sticklebacks of the same age -- one from a stream (top) and one from a lake (bottom) -- are each highly adapted to their own local environment. According to Bolnick, apart from a dramatic difference in size, the fish also differ in immune traits, body shape, armor to defend against predators, and "basically anything we can think to measure."
Photo Credit: Daniel Bolnick/U. of Texas at Austin

New research suggests fish fins may take advantage of 'functional curvature' to increase their stiffness for swimming.
Photo Credit: Mandre Lab / Brown University

Koi teeth, naturally shedded, pictured above.  Two studies on calcium isotopes in teeth have provided new insights into both the extinction of the marine reptiles and weaning age in humans. The findings of these studies, conducted by CNRS researchers at Lyon ENS and Université Claude Bernard Lyon, were published, respectively, on 25 and 30 May 2017 in Current Biology and PNAS. They open new avenues for research in anthropology and paleontology.

James Cook University scientists have found evidence that even distantly related Australian fish species have evolved to look and act like each other, which confirms a central tenet of evolutionary theory.

Tag, you're it, the chase is on! It's early summer and love is in the air, in our ponds that is. It's a beautiful, sunshine day, and then it hits you - foam everywhere; phew, that fishy smell; plants shredded and tipped over. The girls are round and robust and the boys are egg-seeking missiles hot after the girls making laps chasing the girls around the pond. What is all this "kommotion?" The water temperatures and day lengths are ideal and it's time for spawning.

The very first bony fish on Earth was susceptible to arthritis, according to a USC-led discovery that may fast-track therapeutic research in preventing or easing the nation's most common cause of disability.

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