Rakk Hive

Rakk Hive is a gigantic rhino-type creature with holes on its back that release swarms of Rakks. This is the first known boss type mob. From what the trailers have shown they spawn Rakks at a rapid pace and seem to have the ability to do a powerful stomp attack as well as the ability to spit out balls of acid.

Trivia -

He has a resemblance of a species of blue on Blue Gender.

Little has changed in the Rakk Hive's appearance from the original, awesome looking Borderlands of yore.