This is a documentary, research or comparison of the infra red verses the 49 MHz Radio Controlled Air Swimmer Clownfish.
I would recommend doing a bench test to see that the all systems are working properly.
As concluded in this video, you have more luck with the Radio Controlled (RC) Air Swimmers since we have seem to find a lot of defective Infra red Clownfishes in the current market. (A lot of knockoff distributors sell infra red Air Swimmers)
It seems that the person who uploaded this video has deleted it.
But overall the facts in this post remains the same.