Settlement cxpcriments were conducted with larvae of Phragmatopoma lapidosa callfirnica (a reefbuilding sabcllariid polychaetc) in turbulent flume flows (near-surface velocities of 5, 10, 15, 20, 25, 30, and 35 cm s-l) over a hydrodynamically smooth bed. Boundary shear velocities spanned the critical shear velocity for initiation of particle motion and for suspended-load transport of passive la...