Fig. 3
From: First record of the non-indigenous jellyfish Blackfordia virginica (Mayer, 1910) in the Baltic Sea
Seasonal variation of Blackfordia virginica (Mayer, 1910) densities (ind. m−3 ± SD) with average temperature (white dots) and salinity (black dots) conditions in Kiel Canal for the years 2016–2017, when animals were first recorded over a longer time period. First sightings from Oct. 2014 and July 2015 are not shown. Sampling time points (black bars) are shown, with non-quantitative presence indicated by asterisks (*). Note n.a. = no data