Individual Littoraria irrorata body size metrics, shell scar, and age class data in southeastern Louisiana salt marshes, June-September 2016

A suite of body size metrics, number of shell scars, age class, and biomass for individual Littoraria irrorata periwinkles were determined from two replicate plots along a transect of five distance points from the marsh edge in five regions in southeastern Louisiana between the Atchafalaya and Mississippi rivers in June, August and September of 2016. Each row contains the data for an individual periwinkle.