NPCs composing that spawngroup :

an_enthralled_bulthar (80%)

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

sirens_13, range=67 (-817,-232,-72)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_61, range=99 (-766,-261,-42)

sirens_67, range=54 (-827,-214,-72)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_83, range=74 (-749,-112,-177)

sirens_86, range=62 (-821,-109,-177)

sirens_87, range=51 (-748,-162,-179)

sirens_117, range=33 (-832,-167,-153)

sirens_118, range=75 (-724,-165,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

a_coldspine_sea_hors_190190, range=90 (-889,-166,-175)

a_coldspine_seahorse (50%)
a_swordfish (50%)

a_coldspine_sea_hors_190191, range=50 (-849,-167,-168)

a_coldspine_seahorse (100%)

an_icy_servant_190204, range=89 (-888,-155,-172)

a_swordfish (100%)

sirens_223847_takp_import_v0, range=99 (-765,-260,-42)

sirens_an_enthralled_bulthar6_takp_import_v0, range=31 (-830,-167,-153)

an_enthralled_bulthar (100%)

sirens_223833_takp_import_v0, range=52 (-747,-161,-179)

sirens_223838_takp_import_v0, range=75 (-748,-111,-178)

an_enthralled_molkor (50%)
a_watery_servant (50%)

sirens_223852_takp_import_v0, range=89 (-888,-155,-172)

sirens_223841_takp_import_v0, range=50 (-849,-167,-178)

an_enthralled_molkor (50%)
a_neriad_mistress (50%)

sirens_223836_takp_import_v0, range=90 (-889,-166,-179)

sirens_223848_takp_import_v0, range=62 (-820,-108,-177)

an_icy_servant (50%)
a_servant_swordfish (50%)

sirens_an_enthralled_ulthork16_takp_import_v0, range=76 (-723,-164,-153)

an_enthralled_ulthork (100%)