They have a very low surface brightness and do not have obvious galaxy counterparts (e.g. like radio galaxies have AGN counterparts), however, their morphologies typically follow the distribution of gas in the intra-cluster medium.
They have a very low surface brightness and do not have obvious galaxy counterparts (in contrat to radio galaxies which have AGN counterparts). However, their morphologies typically follow the distribution of gas in the intra-cluster medium.