NPCs composing that spawngroup :

an_enthralled_bulthar (50%)

an_enthralled_molkor (50%)

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

sirens_14, range=39 (-378,168,-19)

an_enthralled_bulthar (100%)

sirens_16, range=178 (-555,202,-154)

sirens_20, range=170 (-301,54,-88)

sirens_21, range=143 (-457,88,-114)

sirens_22, range=143 (-408,67,-88)

sirens_24, range=1 (-378,207,-19)

sirens_39, range=115 (-492,194,-155)

sirens_40, range=147 (-513,150,-151)

sirens_41, range=174 (-544,155,-152)

sirens_51, range=120 (-293,121,-121)

sirens_62, range=75 (-342,140,-19)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_81, range=181 (-238,91,3)

sirens_93, range=99 (-353,110,-19)

#Ulth_the_Enraged (20%)
an_enthralled_bulthar (80%)

a_coldspine_sea_hors_190193, range=142 (-456,88,-107)

a_coldspine_seahorse (100%)

a_coldspine_sea_hors_190194, range=155 (-442,66,-115)

a_coldspine_seahorse (100%)

sirens_a_coldspine_sea_horse14_takp_import_v0, range=177 (-554,202,-162)

sirens_223842_takp_import_v0, range=76 (-341,140,-19)

sirens_223843_takp_import_v0, range=181 (-237,91,3)

an_enthralled_molkor (50%)
an_enthralled_ulthork (50%)

sirens_an_enthralled_ulthork16_takp_import_v0, range=179 (-291,49,-85)

an_enthralled_ulthork (100%)

sirens_223859_takp_import_v0, range=171 (-300,54,-88)

a_servant_manatee (50%)
a_servant_sea_elephant (50%)