Common minke whale to 20 growth layers in their tympanic bullae, which may correspond to about 15 to 20 years of age. Both sexes can live to about 50 years of age – the oldest in a study of Icelandic minke whales were 42 years for females and 47 years for males, respectively. Common minke whales have been described as ichthyophagous, but their diet also includes pelagic crustaceans and cephalopods and varies by region, season, and year. In the North Atlantic, they primarily eat small schooling fish, demersal fish, and krill. A 2007 study showed that off Spitsbergen they fed almost exclusively on
Creature type (Dungeons & Dragons) skill points. Certain magic items and special abilities, such as the ranger's favored enemy ability (prior to 4th edition) and bane weapons (in 3rd and 3.5 editions) interact with creature type. An aberration can have a bizarre anatomy, strange abilities, alien mindset, or any combination thereof. Examples include the beholder, illithid (mind flayer) and rust monster. The rules state that all aberrations have darkvision out to 60 feet. As a group, they have no other special abilities or immunities. The game classifies "Animals" as living, nonhuman vertebrate creatures, with no innate magical abilities or capacity for language or culture. Virtually