A rainbow surrounds me, the sky is my sea, but the lightest touch is the end of me.

Seaweed sounding like it wants assistance.

Summer's juicy delight with a green coat and a ruby heart, a picnic's sweet companion, seeds to play the spitting part.

The bigger I am, the more I hide, In salty water I glide. Penguins watch me pass, I'm a giant's looking glass. What am I?

its a color... a type of music... a mood... half the color of the big globe we're on.