In which zone does the frilled shark primarily reside?

Answer

The benthic zone

The text clearly states that the reason the frilled shark remained largely unknown is its strictly deep-sea habitat, identifying it as a creature of the benthic zone.

In which zone does the frilled shark primarily reside?

#Videos

Why This Shark Hasn't Changed in 80 Million Years - YouTube

fishsharkdeep seaPrehistoric