The frilled shark is a predator on the first depth level.
In daytime it will attack you only if there is blood (from you or a fish) or if you attack it.
At night it will attack you if it sees you.
Once killed, frilled shark produce Frilled Shark which reduce hunger by 10%.
Once cooked the Frilled Shark Meat becomes Cooked Frilled Shark and reduce hunger by 50%.