Daily lapillus growth increments were used to determine age and growth parameters forScarus rivulatus(Valenciennes) andCtenochaetus binotatus(Randall) from reefs off Lizard Island in ihe northern Great Barrier Reef. The growth ofS. rivulatusincreased after settlement whilst growth ofC. binotatusdecreased after settlement. A check found in the otoliths of both species, and attributed to settlement, was estimated to be from 28 to 47 days forS. rivulatusand from 47 to 74 days forC. binotatus.