NPCs composing that spawngroup :

an_enthralled_ulthork (100%)

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

sirens_14, range=101 (-301,-53,-88)

an_enthralled_bulthar (100%)
an_enthralled_bulthar (100%)

sirens_15, range=102 (-225,-30,-108)

sirens_16, range=71 (-227,18,-108)

sirens_18, range=120 (-250,-64,-88)

sirens_19, range=158 (-387,-77,-88)

sirens_20, range=11 (-301,54,-88)

sirens_21, range=170 (-457,88,-114)

sirens_22, range=118 (-408,67,-88)

sirens_24, range=180 (-378,207,-19)

sirens_51, range=72 (-293,121,-121)

sirens_62, range=104 (-342,140,-19)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_81, range=104 (-201,102,3)

sirens_84, range=95 (-213,-6,-33)

a_coldspine_seahorse (100%)

sirens_93, range=86 (-353,110,-19)

#Ulth_the_Enraged (20%)
an_enthralled_bulthar (80%)

a_coldspine_sea_hors_190193, range=169 (-456,88,-107)

a_coldspine_seahorse (100%)

a_coldspine_sea_hors_190194, range=151 (-442,66,-115)

a_coldspine_seahorse (100%)

a_coldspine_sea_hors_190199, range=141 (-152,20,-22)

a_coldspine_seahorse (100%)

a_twitching_swordfish, range=155 (-146,105,-53)

a_twitching_swordfish (100%)

sirens_an_enthralled_bulthar6_takp_import_v0, range=114 (-263,-62,-88)

an_enthralled_bulthar (100%)

sirens_a_coldspine_sea_horse14_takp_import_v0, range=151 (-442,66,-115)

sirens_223842_takp_import_v0, range=194 (-352,-136,-21)

sirens_223834_takp_import_v0, range=179 (-377,207,-19)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_223843_takp_import_v0, range=68 (-237,91,3)

an_enthralled_molkor (50%)
an_enthralled_ulthork (50%)

sirens_223858_takp_import_v0, range=105 (-200,102,3)

a_servant_sea_elephant (50%)
a_servant_walrus (50%)

sirens_a_servant_sea_elephant109_takp_import_v0, range=119 (-249,-63,-88)

a_servant_sea_elephant (100%)

sirens_223859_takp_import_v0, range=10 (-300,54,-88)

a_servant_manatee (50%)
a_servant_sea_elephant (50%)