Hákarl or kæstur hákarl is a food from Iceland consisting of a Greenland shark or sleeper shark (Somniosus microcephalus) which has been cured with a particular fermentation process and hung to dry for four to five months. Hákarl is an acquired taste;[1] it has a very particular ammonia-rich smell and fishy taste.
Hákarl is served as part of a þorramatur, a selection of traditional Icelandic food served at þorrablót in midwinter. It is readily available in Icelandic stores and is eaten year round.