NPCs composing that spawngroup :

a_sludge_lurker (100%)

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

snpool60939, range=193 (1143,57,-77)

snpool60949, range=57 (1159,-81,-45)

snpool60968, range=48 (1166,-179,-45)

snpool60981, range=99 (1239,-167,-45)

snpool60985, range=165 (1304,-177,-45)