NPCs composing that spawngroup :

#shimmering_sea_spirit (15%)

an_icy_servant (33%)

a_watery_servant (52%)

NPCs spawning around that spawngroup :
(Max range : 100)

sirens_48, range=95 (-404,-216,-57)

an_enthralled_bulthar (57%)
an_enthralled_bulthar (33%)

sirens_49, range=94 (-587,-256,-28)

sirens_50, range=97 (-586,-279,-28)

sirens_52, range=98 (-585,-216,-52)

sirens_53, range=45 (-538,-246,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_54, range=95 (-547,-329,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_55, range=89 (-555,-314,-42)

a_siren_enticer (50%)
a_siren_priestess (50%)

sirens_56, range=68 (-477,-317,-46)

a_siren_enticer (50%)
a_siren_priestess (50%)

sirens_58, range=35 (-522,-229,-52)

a_siren_enchantress (45%)
a_siren_enticer (40%)

sirens_60, range=52 (-500,-198,-52)

sirens_65, range=83 (-498,-167,-90)

sirens_84, range=97 (-455,-340,-107)

a_coldspine_seahorse (100%)

sirens_223847_takp_import_v0, range=97 (-584,-215,-52)

sirens_223842_takp_import_v0, range=88 (-412,-215,-57)

sirens_a_servant_swordfish9_takp_import_v0, range=86 (-452,-326,-110)

a_servant_swordfish (100%)

sirens_223869_takp_import_v0, range=93 (-586,-255,-28)

sirens_a_siren_seductress22_takp_import_v0, range=31 (-515,-272,-52)

a_siren_seductress (100%)
a_siren_seductress (100%)

sirens_223872_takp_import_v0, range=63 (-522,-306,-52)

a_siren_seductress (75%)

sirens_223873_takp_import_v0, range=96 (-585,-278,-28)

a_siren_enticer (85%)

sirens_223871_takp_import_v0, range=87 (-554,-313,-42)

a_siren_enticer (35%)
a_siren_seductress (40%)