This is calm and quite "sea-like".
I guess that the percussion instruments in this song are:
A xylophone (I don't know if that is percussion)
A tom tom with loose skin or a soft beaten bongo.
Close! There are 3 percussion instruments being used in the piece, but the one I'm asking for originated in southern Africa.
Thanks for listening as well.
Please contact me if you would like to use this in a project. We can discuss the details.