Trochophore

A trochophore is a type of larva found in marine plankton. It belongs to animals of several related phyla, in the superphylum Lophotrochozoa.
They have two or more bands of cilia. By moving their cilia rapidly, a water eddy is created. In this way they control the direction of their movement. Also, in this way they bring their food closer, to capture it more easily.