Why is trochophore larva called trochophore?

The trochophore larva is named for its distinctive ring of cilia, or "trochus," which encircles its body and aids in locomotion and feeding. This larval stage is characteristic of certain marine invertebrates, including mollusks and annelids. The ciliary band allows the trochophore to swim through the water column, facilitating dispersal and the search for food. The term "trochophore" is derived from the Greek Words "trochos," meaning wheel, and "pherein," meaning to carry.