Animals which produce light directly are known as producing Bioluminescence. Anglerfish are different. They do not produce the light with their own bodies like fire flies, rather they have a unique relationship with bacteria called symbiosis, and the bacteria actually produce the light for the anglerfish. This symbiotic relationship is called bioluminesce.
This is how it works:
From Wikipedia:
The term symbiosis (from the Greek: σύν syn"with"; and βίωσις biosis "living") commonly describes close and often long-term interactions between different biological species.
Yes, the angler indeed does make sounds. It makes a beeping trilling sound similar to that of a doorbell's after wave. Anglers also have been known to send out high pitched squeals that only their extremely sensitive ears can hear.
John Gram
Stanford University
Marine Biological Research and Analysis
2nd Division
they reproduce 100 to 300 eggs only 1 hundredth make it
it depends on thier personality and the water tempature some times the top water will be warmer becuase of aquarium lights. I have had 5 angelfish and they stayed in different depths and areas the one that was picked on in the petstore stayed at the top, the mean one stayed at the bottom, the mellow one stayed near the filter, the 2 that did not really show a certain trait just went where ever. Are you going to put them with other fish? i don't recommend putting it with shiny fish.
Not all Anglerfish are deep sea fish. For the ones that are, a few have been brought to the surface but in many cases, they die not long after being brought up.
The anglerfish has stem attached to the tip of its head with a small mass of glowing bacteria on the end which lures fish into the anglerfish thinking its a smaller fish but they soon find out its a trap and get snapped up by the anglerfish.