Common minke whale calls were recorded from October to May – peaking in March – and had a source level of about 150 decibels at a reference pressure of one micropascal at one metre. Their source remained a mystery for decades. By the early 1980s they were thought to come from whales, but it wasn't known what species. In the early 2000s, it was suggested these sounds might originate from minke whales, based on their similarities to vocalizations produced by Southern Hemisphere forms. Finally, during a 2002 HICEAS ("H"awaiian "I"slands "C"etacean and "E"cosystem "A"ssessment "S"urvey) survey, the R/V "David Starr Jordan", using a
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