Brancher

Encountered mostly to rimward of Federation space, the Brancher has been seen far less than the Suvekizer and comparatively less is known. One such entity threatened Seyek and Fiiral space in 2314Q4, where it was chased down by USS Salnas and destroyed by a force lead by the SFS Sign of Rethelia after preying on several Seyek and Konen civilian ships. They appear to pose little threat to ships more well-defended than civilian freighters, but block subspace transmissions preventing them from getting out a distress call.

These are likely the Crystalline Entities encountered in Star Trek: The Next Generation, but direct confirmation has not been made.