  An object discovered during an infrared survey of the field near the quasar
B2 0149+33 has an emission line at 2.25$\mu$m that we interpret as H$\alpha$ at
a redshift of 2.43. The K-band image shows two compact components 10 kpc apart
surrounded by more extended emission over ~20 kpc. The H$\alpha$ emission
appears to be extended over ~15 kpc (2") in a coarsely sampled (0".8/pixel)
image. The star formation rate may be as high as 250 - 1000 M$_\odot$
yr$^{-1}$, depending on the extinction. Alternatively, the line may be powered
by an active nucleus, although the probability of serendipitously discovering
an AGN in the survey volume is only ~0.02. The increasing number of similar
objects reported in the literature indicate that they may be an important,
unstudied population in the high redshift universe.
