The Proboscis is the only omnivore mouth in the Cell Stage. You can obtain it by killing a Nosey or a Bloato. With it, the cell can suck up the (assumingly) blood/innards of other cells and can also eat plant particles, but can't eat meat chunks. It costs 25 DNA points.
It can also be used in the Creature Stage if unlocked, but the final time it can be accessed is the Early Creature Creator. In the Creature Stage it is a simple omnivore mouth, with Level 1 Bite and Sing. It is not required to unlock omnivore mouths later on: that relies purely on a balanced mixture of meat and plant matter being eaten in the Cell Stage.
The proboscis appears as a long elongated tube, which becomes increasingly thinner, with a small increase in thickness at the tip, The creature's texture fade into a a light and desaturated green color; which at the tip, fades into a darker, and more saturated green color.
The proboscis has strange movements, which appear as various parts of it widening/fluctuating/vibrating. But this is rather rare.
If you place Jaws beside a Proboscis (or vice versa), you can eat meat chunks; not from the Proboscis, but from the Jaws. This tactic potentially allows you to gain more meat per kill (two to three from draining the creature, then three from "popping" its carcass), provided that you have a spike part. However, this strategy can easily change your card to a Carnivore, so if you are hoping for Omnivore, then you must eat more plants to balance this out. Another option is to put proboscises on all four sides of the cell, since the proboscis cannot be hit by spikes or another proboscis, probably increasing your survivability and defenses against peer-sized cells. However, it is very costly, as a proboscis costs 25 DNA.
Proboscis can be used to eat an epic-sized Snorf alive, although it will not die to this very often as it has a lot of HP and is very fast. It does not work against other epic cells, and the proboscis is the only mouth that can damage epic cells.
- Through modifications, the player can access unused morph handles. Both handles adjust the wideness of various parts of the proboscis, in a weird fashion way.
- And certain modifications allow the player to access secret cell parts from within normal in-game editors. Revealing the 3 derivatives of Proboscis, which appear as progressively widened versions of Proboscis, most, if not all of which, have teeth.
- If real-life cell anatomy is considered. It is possible that in cell stage, Proboscis works by puncturing through the Plasma Membrane of a cell, and sucking out all of the ATP (Adenosine triphosphate) from the cell, triggering a process called Necrosis (Cell death).