There is a Meaning to all this; links, between arthropoda, television advertising for Sertraline, and Music.

*deep breath*

Sing along now: the tune's I can sing a rainbow and the tone we want is 'nauseating saccharine':

*sings*

Grey and grey and grey and grey;
Gre-ey and gre-ey and GREY:

*extra sweetly*

I can sing a woodlouse,
Sing a wood-louse,
Sing a woodlouse, too.

*awaits applause*