 Early-stage veligers (<120 nm shell length) are fed daily with flagellated algal species ("Isochrysis galbana" or "Pavlova lutherii") along with diatom species (either "Chaetoceros calcitrans" or "Thalassiosira pseudonana").The larvae are close to a settlement stage when dark eye spots and a foot develop.During this time, settlement materials (cultch), such as roughed PVC sheets, fluted PVC pipes, or shells, are placed into the tanks to encourage the larvae to attach and settle.