NPCs composing that spawngroup :

a_swordfish (100%)

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

sirens_13, range=74 (-686,-167,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_48, range=99 (-711,-266,-26)

sirens_49, range=58 (-587,-256,-28)

sirens_50, range=77 (-586,-279,-28)

sirens_52, range=42 (-585,-216,-52)

sirens_53, range=94 (-538,-246,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_64, range=94 (-694,-147,-149)

sirens_78, range=58 (-577,-182,-114)

sirens_231262, range=93 (-703,-267,-27)

an_enthralled_molkor (100%)
an_enthralled_molkor (100%)

sirens_231264, range=74 (-685,-166,-153)

an_enthralled_bulthar (15%)
a_servant_sea_elephant (85%)

sirens_231269, range=60 (-576,-181,-117)

a_coldspine_seahorse (99%)
Fellspine (1%)

sirens_231275, range=43 (-584,-215,-52)

an_icy_servant (100%)

sirens_231277, range=77 (-585,-278,-28)