Tread in the tulips, Nice and light, Swan lake style, Add some height

I am small, prickly, and come with many. Worn on legs, sometimes on arms, my siblings and I are here to protect our wearer. Lose the first and I'm large, lethal and come in pairs. Worn on heads, sometimes on noses, here to be a weapon and protect our bearer.

I'm where the Sun goes down to sleep I inspire sailors to sail waters deep

I greet you before you speak. My tail tells truths my mouth never could. I guard your home but beg at your table. I can be fierce as a wolf or small as a shoe. What am I?

Silent glider in a liquid embrace, scales that shimmer like stolen stars, a dancer beneath the waves, speaking in ripples and currents.