NPCs composing that spawngroup :

an_enthralled_bulthar (33%)

a_coldspine_sea_horse (34%)

a_siren_enticer (33%)

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

sirens_13, range=70 (-817,-232,-72)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_48, range=96 (-786,-324,-134)

an_enthralled_bulthar (57%)
an_enthralled_bulthar (33%)

sirens_67, range=77 (-827,-214,-72)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_78, range=46 (-879,-233,-152)

sirens_91, range=1 (-871,-279,-178)

sirens_223847_takp_import_v0, range=78 (-826,-213,-72)