Barreleye Fish:
Macropinna microstoma is the only species of fish in the genus Macropinna, belonging to Opisthoproctidae family.
Scientific Name
The scientific name for the barrelfish (or spookfish) is Macropinna microstoma..
Scientific Classifactation
Relatives of the Spookfish
The Spookfish has many relatives, the closest animals I found were the Mirrorbelly and Winteria telescopa.
Who Studies The Spookfish
I hope that you could have guessed the answer, a marine biologist!!