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) a change to an animal creature that increases its Intelligence or grants it additional abilities, the designer is encouraged to also change the creature's type, usually from animal to magical beast. When real world animals are rendered as vermin (see below) in D&D, they have no Intelligence scores at all. In 3rd edition, the beast type was used for nonhistoric and fantastic, but not necessarily magical vertebrates. The beast type was merged into the animal type in 3.5 edition. A construct is either an animated object of some sort, or an artificially crafted creature. Most construct are mindless automatons, obeying