NPCs composing that spawngroup :

a_neriad_mistress (100%)

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

sirens_19, range=73 (46,-47,5)

sirens_23, range=74 (47,-60,5)

sirens_27, range=82 (36,-1,-80)

a_siren_myrmidon (50%)
a_siren_myrmidon (50%)

sirens_35, range=65 (33,-81,-135)

sirens_36, range=67 (34,-26,-135)

sirens_37, range=82 (24,11,-135)

sirens_38, range=92 (28,-129,-135)

a_siren_beguiler (100%)

sirens_44, range=58 (-63,-100,3)

sirens_47, range=87 (19,20,-20)

a_coldspine_seahorse (50%)
a_swordfish (50%)

sirens_70, range=36 (-54,-78,-133)

sirens_72, range=33 (-51,-30,-133)

sirens_73, range=92 (65,-44,-148)

sirens_126, range=81 (36,-106,-80)

a_siren_templar (50%)
a_siren_templar (50%)

sirens_127, range=91 (-49,-143,-117)

sirens_130, range=87 (-43,32,-117)

a_siren_myrmidon (50%)
a_siren_templar (50%)

sirens_131, range=66 (-54,7,-110)

a_siren_beguiler (50%)
a_siren_templar (50%)

sirens_132, range=53 (-64,-16,-104)

sirens_133, range=31 (-57,-65,-100)

sirens_134, range=37 (-63,-44,-100)

sirens_135, range=50 (-63,-90,-104)

sirens_136, range=73 (-58,-121,-110)

a_servant_sea_elepha_190188, range=98 (71,-61,-148)

a_servant_swordfish_190210, range=89 (54,-15,-19)

a_swordfish (100%)

sirens_112963, range=56 (29,-54,-135)

#Faleniel_of_Darkwater (100%)

sirens_231252, range=98 (71,-61,-152)

a_servant_manatee (100%)

sirens_231256, range=62 (-19,8,-13)

a_servant_swordfish (100%)
a_servant_swordfish (100%)

sirens_231264, range=74 (47,-59,5)

sirens_231274, range=33 (-50,-29,-133)

a_watery_servant (100%)

sirens_231277, range=67 (34,-25,-135)

sirens_231278, range=81 (36,-105,-80)

a_siren_seductress (100%)

sirens_231279, range=34 (-53,-77,-133)

#shimmering_sea_spirit (10%)
an_icy_servant (90%)