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_42, range=42 (-627,-213,-111)

a_swordfish (100%)

sirens_49, range=40 (-587,-256,-28)

sirens_50, range=63 (-586,-279,-28)

sirens_53, range=55 (-538,-246,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_58, range=64 (-522,-229,-52)

sirens_59, range=98 (-493,-250,-51)

sirens_60, range=86 (-500,-198,-52)

sirens_65, range=99 (-498,-167,-90)

sirens_78, range=35 (-577,-182,-114)

sirens_231269, range=36 (-576,-181,-117)

a_coldspine_seahorse (99%)
Fellspine (1%)

sirens_231274, range=98 (-492,-249,-51)

a_watery_servant (100%)
a_watery_servant (100%)

sirens_231275, range=1 (-584,-215,-52)

an_icy_servant (100%)

sirens_231277, range=62 (-585,-278,-28)

sirens_231278, range=89 (-515,-272,-52)

a_siren_seductress (100%)

sirens_231281, range=64 (-522,-229,-52)