NPCs composing that spawngroup :

a_servant_manatee (33%)

a_servant_manatee (34%)

a_walrus_servant (33%)

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

sirens_1, range=82 (204,-126,-181)

sirens_18, range=27 (203,-28,3)

sirens_27, range=80 (102,-40,-135)

a_siren_myrmidon (50%)
a_siren_myrmidon (50%)

sirens_30, range=88 (165,-133,-135)

sirens_31, range=43 (222,-64,-135)

sirens_32, range=40 (221,-37,-135)

sirens_33, range=23 (175,-68,-135)

sirens_34, range=14 (177,-32,-135)

sirens_45, range=50 (148,-8,3)

sirens_57, range=68 (128,-88,-149)

a_neriad_mistress (100%)

sirens_69, range=60 (201,-103,-181)

sirens_71, range=70 (119,-78,-153)

a_neriad_mistress (50%)
a_neriad_mistress (50%)

sirens_84, range=64 (246,-53,-138)

a_coldspine_seahorse (100%)

sirens_108, range=15 (168,-52,-80)

sirens_109, range=66 (115,-52,-100)

sirens_110, range=69 (115,-67,-100)

sirens_114, range=28 (153,-53,-58)

sirens_115, range=45 (136,-52,-64)

sirens_116, range=12 (170,-49,-54)

#Mistress_of_the_Darkwater (100%)

sirens_118, range=71 (132,-97,3)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_119, range=83 (102,-71,-135)

sirens_124, range=74 (143,18,-54)

sirens_138, range=97 (200,-142,-135)

sirens_140, range=85 (260,-11,-135)

sirens_141, range=98 (270,-91,-135)

a_servant_sea_elepha_190189, range=11 (177,-36,4)

a_servant_swordfish_190211, range=87 (269,-52,-150)

a_servant_swordfish (100%)

sirens_112964, range=89 (271,-39,-160)

Ravaging_Tsunami_Elemental (100%)