A simple technique for measuring buoyant weight increment of entire, transplanted coral colonies in the field

► We introduce a method for buoyant weight measurement of corals under water. ► Corals are transplanted with minimal impact onto PVC-plates using epoxy resin. ► Weight is measured with an electronic balance in an underwater housing. ► Errors due to coral density variation and of repeated measurements are very low. ► Long-term and longitudinal studies of coral growth can be performed.