Effect of salinity and substrate grain size on larval settlement of the asari clam (Manila clam, Ruditapes philippinarum)

► Effects of environmental factors on clam larval settlement were tested. ► Larval settlement increased as the salinity decreased until salinity reached 13. ► Larvae have the ability to settle on a wide range of substrate grain sizes. ► Results aid in understanding of the variation in larval settlement in nature.