NPCs composing that spawngroup :

an_enthralled_bulthar (50%)

NPCs spawning around that spawngroup :
(Max range : 200)

sirens_42, range=191 (-627,-213,-111)

a_swordfish (100%)

sirens_48, range=97 (-786,-324,-134)

sirens_61, range=58 (-766,-261,-42)

sirens_62, range=73 (-749,-260,-42)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_64, range=149 (-694,-147,-149)

sirens_67, range=20 (-827,-214,-72)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_78, range=61 (-879,-233,-152)

sirens_83, range=186 (-714,-387,-120)

sirens_86, range=123 (-821,-109,-177)

sirens_87, range=98 (-748,-162,-179)

sirens_90, range=194 (-865,-420,-181)

sirens_91, range=71 (-871,-279,-178)

sirens_93, range=68 (-799,-167,-153)

#Ulth_the_Enraged (20%)
an_enthralled_bulthar (80%)

sirens_94, range=188 (-722,-69,-177)

sirens_107, range=166 (-874,-388,-154)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_117, range=66 (-832,-167,-153)

sirens_118, range=114 (-724,-165,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

a_coldspine_sea_hors_190190, range=97 (-889,-166,-175)

a_coldspine_seahorse (50%)
a_swordfish (50%)

a_coldspine_sea_hors_190191, range=72 (-849,-167,-168)

a_coldspine_seahorse (100%)

an_icy_servant_190204, range=104 (-888,-155,-172)

a_swordfish (100%)

sirens_223847_takp_import_v0, range=74 (-748,-259,-42)

sirens_an_enthralled_bulthar6_takp_import_v0, range=156 (-873,-378,-154)

an_enthralled_bulthar (100%)
an_enthralled_bulthar (100%)

sirens_223833_takp_import_v0, range=99 (-747,-161,-179)

sirens_223838_takp_import_v0, range=139 (-748,-111,-178)

an_enthralled_molkor (50%)
a_watery_servant (50%)

sirens_a_coldspine_sea_horse14_takp_import_v0, range=185 (-713,-386,-120)

a_coldspine_sea_horse (100%)

sirens_223867_takp_import_v0, range=70 (-870,-278,-178)

sirens_223852_takp_import_v0, range=104 (-888,-155,-172)

sirens_223841_takp_import_v0, range=72 (-849,-167,-178)

an_enthralled_molkor (50%)
a_neriad_mistress (50%)

sirens_223845_takp_import_v0, range=192 (-864,-419,-182)

sirens_223836_takp_import_v0, range=97 (-889,-166,-179)

sirens_223848_takp_import_v0, range=124 (-820,-108,-177)

an_icy_servant (50%)
a_servant_swordfish (50%)

sirens_223868_takp_import_v0, range=190 (-721,-68,-178)

sirens_an_enthralled_molkor13_takp_import_v0, range=119 (-703,-267,-27)

an_enthralled_molkor (100%)

sirens_223843_takp_import_v0, range=150 (-693,-146,-149)

an_enthralled_molkor (50%)
an_enthralled_ulthork (50%)

sirens_an_enthralled_ulthork16_takp_import_v0, range=116 (-723,-164,-153)

an_enthralled_ulthork (100%)

sirens_223837_takp_import_v0, range=147 (-685,-166,-153)

#Ulth_the_Enraged (20%)
an_enthralled_bulthar (80%)