Guppy acting strange

[Nbiaz]

I got a school of guppies a few hours ago and they are all schooling but this one he just swims into the wall I think he is playing with his reflection but I am worried something is wrong with it the tank is stocked with a blood parrot a gold sevrum and a striped Rafael. There is 3 other male guppies and 3 female guppies
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[Davidiator]

Had this happen with a Molly so i gave him to a friend and he is as happy as ever (living in a tank by himself and he is a little over 4 1/2 inches long)

 

[itrebebag99]

I don't think that a reflection can be seen from the inside of an aquarium. A mirror-like reflection will be seen when you are looking at a 90 degree angle through a prism, but I do not believe that a reflection can be seen when one is inside the prism.