The Hedeomiks were a technologically advanced civilization from the Delta Quadrant. The Borg Collective knew them as Species 9552. (VOY novel: A Pocket Full of Lies)
History[]
In June/July 2382, Federation mission specialist Seven of Nine, a liberated Borg drone, visited Lillestan and noticed that the live music in the smoky bar Jewl's was provided by a quartet of identically attired Hedeomiks. Their instruments were partially submerged in green liquid. (VOY novel: A Pocket Full of Lies)