NPCs composing that spawngroup :

a_coldspine_seahorse (25%)

a_coldspine_seahorse (25%)

a_swordfish (25%)

a_swordfish (25%)

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

sirens_13, range=98 (-817,-232,-72)

sirens_62, range=98 (-749,-260,-42)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_64, range=56 (-694,-147,-149)

sirens_67, range=94 (-827,-214,-72)

an_enthralled_bulthar (50%)
an_enthralled_molkor (50%)

sirens_83, range=50 (-749,-112,-177)

sirens_86, range=90 (-821,-109,-177)

sirens_93, range=50 (-799,-167,-153)

#Ulth_the_Enraged (20%)
an_enthralled_bulthar (80%)

sirens_94, range=96 (-722,-69,-177)

sirens_117, range=84 (-832,-167,-153)

sirens_118, range=24 (-724,-165,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_231262, range=51 (-748,-111,-178)

an_enthralled_molkor (100%)
an_enthralled_molkor (100%)

sirens_231263, range=50 (-799,-167,-153)

sirens_231264, range=74 (-694,-110,-149)

sirens_231274, range=99 (-765,-260,-42)

a_watery_servant (100%)

sirens_231275, range=97 (-748,-259,-42)

sirens_231277, range=97 (-721,-68,-178)

a_siren_enticer (100%)