they are music made by AMP Music, which are flying in the background. They were composed by m.in. Sage Guyton, Jeremy Wakefield, Hans Haiden and others.
https://soundeffects.fandom.com/wiki/File:SpongeBob_Music_Wooden_Bear.ogghttps://soundeffects.fandom.com/wiki/File:SpongeBob_Music_Hawaiian_Calypso.ogg
Soundeffects Wiki