What feature gives the frilled shark its common name?

Answer

Six pairs of red, fringe-like gill slits

The shark possesses six pairs of gill slits, which are red and look like frills bordering its head, hence its common name.

What feature gives the frilled shark its common name?

#Videos

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

fishsharkdeep seaPrehistoric