[2][3] It is found to be hosted inside a massive star-forming galaxy containing large reservoirs of gas and interstellar dust.

[12] Two Lyα emitting companions located at z = 3.1378 +/- 0.0028 and z = 3.1351 +/- 0.0028, are found in the MRC 0316-257 protocluster according to research conducted by Le Fevre et al.

The galaxy has an extremely blue V - I color indicating it as a protogalaxy in the midst of forming the first stars in a low-dust medium.

They have ~2.5 x 10-3 h 350 Mpc-3, making them significantly higher than the expected background density of field galaxies, suggesting as a rich cluster.

This are larger compared with the density of field Ly-alpha emitters at that redshift with a velocity distribution of 1510 km/s, smaller than the width of the narrow-band filter (FWHM ~ 3500 km/s).