Answer:
A stellar five-Βlimbed sea creature.
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from Noah's ark won quick release.
It's small but larger than a bee, And agile as a flea. It humms but does not buzz, And it's not covered with fuzz. It is a small collector, Of juicy flower nectar.
What animal dwells in water and best known for its work ethic?
A mysterious, fantastic creature, It has one defining feature, And for humans at their worst, In their eyes it's just a horse