Sphoeroid

Sphoeroids are a species from the rainy planet Scalpasc.

Appearance
Sphoeroids are large, green, blowfish/lizard-like creatures with tan undersides. As their species' name suggests, they have round, fat bodies that are mostly dominated by their "head". They also have stubby legs, feet shaped like that of a rhinoceros, short arms ending in bloated four-fingered hands, and long lizard-like tails.

A Sphoeroid's face consists of a large, jaw-filled mouth with black lips, round yellow eyes at the corners, three green "quills" on the forehead, and two tan quills on the chin.

Abilities
Sphoeroids are able to expand to spew massive amounts of green, semi-adhesive slime. This slime can be highly conductive, as shown when a Nosedeenian electrified a puddle of the slime to attack Mot Snikrep.

Because they have no nostrils, Sphoeroids are immune to poisonous gases like those on their home planet.

Weaknesses
Sphoeroids can accidentally slip on their own slime.

Sphoeroids can be unintentionally shocked due to their slime being highly conductive.

Omnitrix Transformation
The Omnitrix's Sphoeroid representative is named Spitter, who first appeared in the original series episode "Ben 10,000". According to Derrick J. Wyatt, he was originally unlocked off-screen after Destroy All Aliens. Spitter solely appears in the original series.

Spitter has also been used by Ben 10,000 and Ken 10.

Etymology
Sphoeroid is a genus of pufferfishes.