NPCs composing that spawngroup :

a_swordfish (100%)

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

sirens_1, range=53 (83,-60,-146)

sirens_19, range=32 (46,-47,5)

sirens_23, range=45 (47,-60,5)

sirens_24, range=40 (74,20,3)

sirens_25, range=53 (77,33,3)

an_enthralled_molkor (100%)

sirens_27, range=54 (102,-40,-135)

sirens_35, range=69 (33,-81,-135)

sirens_36, range=22 (34,-26,-135)

sirens_37, range=39 (24,11,-135)

sirens_45, range=94 (148,-8,3)

sirens_47, range=49 (19,20,-20)

a_coldspine_seahorse (50%)
a_swordfish (50%)

sirens_71, range=90 (119,-78,-153)

a_neriad_mistress (50%)
a_neriad_mistress (50%)

sirens_73, range=31 (65,-44,-148)

sirens_74, range=89 (-27,-54,-157)

a_neriad_mistress (100%)

sirens_109, range=71 (115,-52,-100)

sirens_110, range=80 (115,-67,-100)

sirens_115, range=90 (136,-52,-64)

sirens_119, range=73 (102,-71,-135)

sirens_123, range=62 (100,28,-54)

a_siren_beguiler (50%)
a_siren_myrmidon (50%)

sirens_124, range=94 (143,18,-54)

sirens_125, range=43 (44,27,-54)

sirens_126, range=92 (36,-106,-80)

a_siren_templar (50%)
a_siren_templar (50%)

sirens_127, range=51 (45,36,-80)

sirens_128, range=91 (4,62,-135)

a_servant_sea_elepha_190188, range=49 (71,-61,-148)

a_coldspine_sea_hors_190201, range=34 (75,-42,-149)

a_coldspine_seahorse (50%)
a_swordfish (50%)

a_servant_swordfish_190209, range=35 (53,20,-16)

a_swordfish (100%)

sirens_112963, range=46 (29,-54,-135)

#Faleniel_of_Darkwater (100%)

sirens_231252, range=49 (71,-61,-152)

a_servant_manatee (100%)

sirens_231256, range=76 (-19,8,-13)

sirens_231263, range=34 (75,-42,-150)

sirens_231264, range=44 (47,-59,5)

sirens_231277, range=22 (34,-25,-135)

sirens_231278, range=91 (36,-105,-80)

a_siren_seductress (100%)
a_siren_seductress (100%)