Assembled file of spring annual averages of pelagic tunicate organic biomass as carbon from the Southern California region, 1951 - 2011.

Derived dataset of approximately a dozen measures of annual springtime biomass of pelagic tunicates since 1951 (ongoing). Enumeration of net-towed samples (salps, doliolids, appendicularians, and pyrosomes) are converted to organic carbon biomass using length-carbon relationships (original from the zooplankton dataspace). Reference for pelagic tunicate organic carbon is Lavaniegos and Ohman (2007).