Competition for food can be observed in the macroplankton community in the Vistula Lagoon (northern Poland) in the spring (April-May-June). This is the time of mass occurrence of early developmental stages of the Baltic Sea herring. the European smelt. perch. https://www.spidertattooz.com/OPI-GelColor-The-Color-That-Keeps-On-Giving-0-5-oz-HPJ07-p22791/