Hoki fish

Hoki fish also known as blue grenadier, blue hake, New Zealand whiptail is a fish found southern Australia and New Zealand at depths of between 10 to 1,000 m.

Hoki fish can grow up to 60 to 120 cm in length and its white meat is commonly used in McDonald's Filet-O-Fish and McFish sandwiches. For a time, the fish was also used at Long John Silver's and Denny's restaurants in the U.S. and is still used by Denny's in New Zealand.

The Hoki fish fishing practice has drawn some criticism.  A 2009 New York Times article questioned the sustainability of the hoki fish fishing practices around New Zealand, which allows an annual fishing quota of about 100,000 tons.  But the New Zealand fishing industry disputes the questions.

Those who have eaten fish sandwiches at McDonald's may have known the taste of hoki fish.  It does not taste awfully tasty or savory, but it does not give you any offensive fishy note either.

The nutrition information for the fish does not show up in the USDA National Nutrient Database for Standard Reference.  But rumor has it that hoki fish contains high amounts of omega 3 fatty acids which render a range of health benefits.