Snail growth data from: Invasive bryozoan alters interaction between a native grazer and its algal food. A Canadian Healthy Oceans Network Ecosystem Function Project, EF-11.

Weekly measures of shell height (mm) of individual snails (Lacuna vincta) maintained in feeding arenas in the laboratory over 4 weeks on single diets of either kelp (Saccharina latissima) encrusted by the invasive bryozoan M. membranacea, non-encrusted kelp, or starved. Data include arena identifier, individual identifier (nested within arena), diet, initial shell height (mm), and shell heights at the end of weeks 1-4 (mm).