NPCs composing that spawngroup :

##_a_coldspine_seahorse (100%)

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_87, range=0 (-748,-162,-179)

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

#Ulth_the_Enraged (50%)
an_enthralled_bulthar (50%)

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_288184, range=98 (-817,-232,-72)

##_an_enthralled_bulthar (100%)
##_an_enthralled_bulthar (100%)

sirens_288185, range=98 (-749,-260,-42)

##_an_enthralled_bulthar (75%)
##_an_enthralled_molkor (25%)

sirens_288186, range=56 (-694,-147,-149)

sirens_288187, range=94 (-827,-214,-72)

##_an_enthralled_bulthar (50%)
##_an_enthralled_molkor (50%)

sirens_288193, range=96 (-722,-69,-177)

##_a_coldspine_seahorse (100%)

sirens_288197, range=90 (-821,-109,-177)

##_a_coldspine_seahorse (50%)
##_a_swordfish (50%)

sirens_288210, range=50 (-749,-112,-177)

##_a_swordfish (100%)

sirens_288213, range=50 (-799,-167,-153)