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) immunities. A monstrous humanoid is similar to a humanoid (see above), but usually has monstrous or animalistic features. Examples include harpies and minotaurs. All monstrous humanoids have darkvision out to 60 feet; many have supernatural abilities as well. An ooze is an amorphous or mutable creature without a single solid form. Oozes are usually mindless and homogeneous, and reproduce by simply splitting into two. The most famous ooze is the gelatinous cube. Many oozes dwell underground, and most secrete an acid from their skin that dissolves flesh and other materials rapidly. Oozes are essentially blind, but an ability called "blindsight",