The creature is very similar in appearance to the creature in Alien (1979). It attacks by grabbing onto the mouth of its victim before entering the victim's body. It bursts out of the chest of the victim. When the creature opens its mouth, another extension comes out of the mouth and opens its mouth.
In the beginning of the film a woman calls the police station looking for Det. McLemore (Napier). The sergeant at the desk answers the phone identifying himself as "Sgt. Yemana". Det. Sgt. Yemana was famously played by Jack Soo in Barney Miller (1975-1982) also starring Ron Glass, who is McLemore's partner.