The Mother

From the Resistance Wiki

The Mother is a Chimera that appears to be a larger form of the Siren. It is not known if "The Mother" is a variation of the Siren strain, or if it is an entirely new Chimera.

Near the final boss battle with The Chrysalis, James Grayson has to fight this creature, which is many times larger than the normal Sirens that are encountered.

The Mother uses the similar sonar attacks but also has the ability to suck the player towards it. During this special attack, if the proper button combination is not pressed, it will proceed to consume the player and throw him/her away as half eaten "fish food". Although the entire battle takes place underwater, the liquid is breathable; similar to the liquid Raine Bouchard was kept in Bonn. This boss shows weakness to any of the Razor BM003's attacks.

Chimera
Strains		Advanced Hybrid | Alpha Grim | Angel | Boiler | Brute | Burrower | Carrier | Chameleon | Cocoon | Crawler | Fury | Gray Jack | Grim | Hag | Hardfang | Howler | Hybrid | Leaper | Leaper Pod | Leech | Marauder | Mauler | Menial | Pure Chimera | Queen Leaper | Ravager | Roller | Siren | Slipskull | Spinner | Steelhead | Titan | Widowmaker
Bosses		The Chrysalis | Daedalus | Kraken | Leviathan | The Mother | Mother Spinner | The Swarm