NPCs composing that spawngroup :

an_enthralled_bulthar (33%)

an_icy_servant (33%)

a_siren_seductress (34%)

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

sirens_1, range=75 (-335,-303,-174)

sirens_48, range=36 (-404,-216,-57)

an_enthralled_bulthar (57%)
an_enthralled_bulthar (33%)

sirens_68, range=73 (-331,-187,-169)

a_neriad_mistress (50%)
a_swordfish (50%)

sirens_77, range=73 (-311,-214,-167)

a_neriad_mistress (50%)
a_neriad_mistress (50%)

sirens_79, range=1 (-380,-243,-170)

a_coldspine_sea_hors_190196, range=32 (-374,-210,-169)

a_coldspine_seahorse (50%)
a_swordfish (50%)

sirens_223842_takp_import_v0, range=42 (-412,-215,-57)

sirens_223869_takp_import_v0, range=32 (-374,-210,-173)

a_siren_enticer (50%)
a_siren_seductress (50%)

sirens_223870_takp_import_v0, range=74 (-310,-213,-170)

sirens_223862_takp_import_v0, range=74 (-330,-186,-169)