They behave identically to regular Oobs such as charging in Harbinger-style when Isaac is horizontal from it- but this charge is very quick as it charges to his direction and then doubles back, charging back to its original position.
- Black Maws are also enemies from one of Edmund McMillen's previous games, Super Meat Boy.
- They were actually called "Black Monsters" from Super Meat Boy, but they were also known as Black Crocodile or Black Shooters. A popular name is "Demon Maws".
- Black Maws are the only enemies to have a Harbinger-styled charge attack. Same apply to Oobs.