Ontogenetic scaling exponents from LSRs of log10 body mass in relation to log10 body length (bL) and log10 RMR in relation to log10 body mass (bR) for larvae, juveniles and/or adults of the Atlantic ctenophore Beroe ovata, moon jellyfish A. aurita, Pacific oyster C. gigas, common mussel M. edulis and spiny lobster S. verreauxi; for nauplii, copepodites and adults of the copepod M. brasilianus; and for solitary and aggregate life cycle stages of the salps (pelagic tunicates) Salpa fusiformis and S. thompsoni. Values of bL and bR were taken or calculated from published data in the sources listed in the electronic supplementary material, where additional data and methodological information can also be found. Values of bA for log10 body SA in relation to log10 body mass were estimated from bL values and scaling exponents of body width versus length (electronic supplementary material). When data for scaling of width versus length were not available, ranges of potential bA values are given (based on equations (3.1) and (3.2)). Note the parallel changes in bA and bR values (shown in italic), regardless of whether decreases or increases in bR were observed during ontogeny (except possibly for the transition from veliger larvae to juveniles in M. edulis; also see text). Statistically significant ontogenetic shifts in bL and bR values occur in all species, except for between solitary and aggregrate life stages of S. thompsoni.