NPCs composing that spawngroup :

a_siren_beguiler (50%)

a_siren_templar (50%)

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

sirens_27, range=90 (36,-1,-80)

a_siren_myrmidon (50%)
a_siren_myrmidon (50%)

sirens_36, range=93 (34,-26,-135)

sirens_37, range=78 (24,11,-135)

sirens_47, range=74 (19,20,-20)

a_coldspine_seahorse (50%)
a_swordfish (50%)

sirens_70, range=85 (-54,-78,-133)

sirens_72, range=37 (-51,-30,-133)

sirens_74, range=66 (-27,-54,-157)

a_neriad_mistress (100%)

sirens_128, range=79 (4,62,-135)

sirens_129, range=50 (-34,53,-125)

sirens_130, range=27 (-43,32,-117)

a_siren_myrmidon (50%)
a_siren_templar (50%)

sirens_132, range=25 (-64,-16,-104)

sirens_133, range=72 (-57,-65,-100)

sirens_134, range=51 (-63,-44,-100)

sirens_135, range=97 (-63,-90,-104)

a_coldspine_sea_hors_190199, range=98 (-152,20,-22)

a_coldspine_seahorse (100%)

sirens_231256, range=35 (-19,8,-13)

a_servant_swordfish (100%)

sirens_231263, range=81 (17,46,3)

sirens_231274, range=36 (-50,-29,-133)

a_watery_servant (100%)

sirens_231277, range=93 (34,-25,-135)

sirens_231278, range=79 (4,62,-135)

a_siren_seductress (100%)

sirens_231279, range=84 (-53,-77,-133)

#shimmering_sea_spirit (10%)
an_icy_servant (90%)