NPCs composing that spawngroup :

a_coldspine_seahorse (100%)

NPCs spawning around that spawngroup :
(Max range : 200)

sirens_10, range=141 (-551,-25,-92)

sirens_11, range=99 (-523,7,-110)

sirens_12, range=136 (-511,-52,-114)

sirens_14, range=184 (-301,-53,-88)

sirens_16, range=176 (-555,202,-154)

sirens_17, range=114 (-469,-45,-88)

sirens_19, range=153 (-387,-77,-88)

sirens_20, range=141 (-301,54,-88)

sirens_21, range=26 (-457,88,-114)

sirens_22, range=34 (-408,67,-88)

sirens_24, range=154 (-378,207,-19)

sirens_39, range=137 (-492,194,-155)

sirens_40, range=109 (-513,150,-151)

sirens_41, range=135 (-544,155,-152)

sirens_43, range=191 (-492,-119,-115)

sirens_51, range=158 (-293,121,-121)

sirens_62, range=124 (-342,140,-19)

sirens_64, range=186 (-531,-98,-91)

sirens_86, range=183 (-607,147,-203)

sirens_93, range=99 (-353,110,-19)