Table 1.

Gelatinous macrozooplankton abundance and size characteristics for Danish Q1-2022 dataset. Total number of animals (n) for each species, standardized per volume (1000 m^-3) and area (m^-2) are provided as average (± SD) across all stations, as well as their respective maximum density. Sizes were estimated for all species from individual measurements or from sub-samples. For some stations, species-specific size information was missing and extrapolated (est. size) from nearby stations, as indicated by est. size / total number of stations this species was recorded at (total), as outlined in the last column. For example, A. vitrina was caught at 13 stations and size information was not available and estimated for 2 stations (2/13).

DK IBTS Q1 2022			Abundance		Abundance		Size			Stations
			(1000 m-3)		(m-2)		(mm)
Class	Species	n	av. ± SD	max.	av. ± SD	max.	av. ± SD	min.	max.	est.size/total
Hydrozoa	Aequorea vitrina	38	0.6 ± 1.1	4.12	0.02 ± 0.03	0.11	135 ± 46.1	19	240	2/13
	Aglantha digitale	62,523	242 ± 393	2488	10.3 ± 17.1	102.5	7.9 ± 2	3	19	0/51
	Clytia spp.	42	9.89	9.89	0.43	0.43	6.3 ± 1.8	3	12	0/1
	Leuckartiara octona	19	0.5 ± 0.37	1.24	0.01 ± 0.005	0.02	7.3 ± 1.2	6	11	0/9
	Muggiaea atlantica	1	0.22	0.22	0.01	0.01	5.3	5	5	0/1
	Physophora hydrostatica	7	0.18 ± 0.05	0.23	0.008 ± 0.003	0.011	N/A	N/A	N/A	7⁎
	Tima bairdii	92	0.71 ± 0.52	1.84	0.04 ± 0.03	0.12	48.8 ± 10.2	20	87	0/22
Scyphozoa	Cyanea spp.	51	0.88 ± 0.78	2.6	0.03 ± 0.03	0.1	42.2 ± 35.6	10	150	0/13
Ctenophora	Beroe spp.	100	1.03 ± 1.23	4.76	0.04 ± 0.05	0.17	43 ± 16.2	9	187	10/23
	B. infundibulum	19	0.44 ± 0.18	0.67	0.02 ± 0.01	0.04	38.4 ± 8	28	47	6/8
	Mnemiopsis leidyi	503	11.5 ± 14.2	35.8	0.21 ± 0.23	0.64	24.1 ± 2.4	8	44	0/11
	Pleurobrachia pileus	2,671	8.88 ± 15.2	67.1	0.41 ± 0.71	3.34	16.7 ± 3.4	5	31	0/52

^⁎No size information.