Funny but not as much as expected

I have long wondered whether I so get me a fish or a controllable submarine, but this was too expensive so should her the fish.

The delivery came quickly thanks to Prime shipping but the fish does not swim as expected.
In product video it looks as if the fish swims up and down and at obstacles "past" floats.

Well I realize that this may work only BUT:

Just like the fish in the water is only after he swims under. By varying the speed and ease "right twist" works "swim around" obstacles Although quite well but he crawls around on the ground only.

For this purpose that comes after 4h the batteries were empty - a spare pair is but then you need new LR44H button cells which are not so cheap!

Nevertheless, my fish had recently fun and swam after him - and an eye-catcher is the shark all times.

Nevertheless, I do not recommend further the Prodkut and it would not buy again.