Can anyone tell me what type of fish this is?
Not an expert, but an online search for bioluminscent fish led me to a bioluminescent toadfish called Porichthys porosissimus. The ventral angle of your specimen looks a lot like the photos I could find...

 

 Source: Robertson, R on Fishbase 

Like many midshipman fish, P. porosissimus have photophores (those dots in your specimen) that glow to attract prey:



 Source: W. Ward (Rutgers Center for Research and Education in Bioluminescence and Biotechnology)