Dianoga

Dianoga were sentient cephalopods characterized by seven suckered tentacles, an eyestalk, a mouth of sharp teeth, and several hearts. They could grow to a length of 7 to 10 meters. Their blood had a blue tint. Dianoga were omnivores, feeding on smaller animals like fish and crabs, but also feed on bones and aquatic plants. The trash squid was part of the Dianoga family.

Although they could survive in the open air for short periods of time, dianoga were entirely dependent on water, lest they completely dried out. While physically hermaphroditic, dianoga could choose to identify as female, diangous (the most common gender), or male. The mating process involved partners exchanging eggs with one another. The normal skin color of a mature individual was a deep purple, but dianoga could change their color and patterns for active . They could notably turn black, gray, and even transparent. They also had the ability to regenerate lost limbs.

Dianoga had a primitive tribal culture. When they were not feeding, they often spoke a deep, complex humming language. Because its reverberations carried so completely in the water, that language scared away all nearby prey. Their people venerated water, which they called "the Great Cleanser When It Was Time to Be Cleansed," and believed in .

Dianoga hailed from Vodran, a swampy planet located in the Si'Klaata Cluster. They shared their world with the sentient Vodrans, who usually stayed well away from the deeper wetlands.

One dianoga inhabited the junkyard world Bracca during the early days of the Galactic Empire. The being made a home within the waters that flooded the remains of a derelict Venator-class Star Destroyer, one of many such vessels left for scrap on the planet. In the year 19 BBY, members of the rogue clone commando squad Clone Force 99 entered the wrecked cruiser, searching for a medical bay within the ship. One of their number, the group's demolitions expert Wrecker, briefly wrestled with the dianoga when he found himself dangling from a cable over the being's watery home. Blasterfire from the other clones, however, drove the dianoga off and ended the encounter.

During the trade wars, the collector Dok-Ondar offered to pay crime lord Jabba the Hutt double if he threw in Ki-Adi-Mundi's lightsaber with the dianoga pup he was selling to him. At some point before the Battle of Yavin in 0 BBY, a female dianoga named Omi was captured by Vodrans, who handed her to members of the Empire en route to their new Death Star battle station. She was dumped into the Death Star's garbage masher 3263827, where she would feed on the organic materials that occasionally fell in. During the rescue of Leia Organa, Luke Skywalker first realized something was alive in the garbage compactor, but shortly after his realization, Omi dragged Skywalker under the mucky water. Han Solo, Chewbacca, and Organa tried to help the struggling Skywalker, only for the dianoga released Luke just before the walls began to close.

During the skirmish on the Ghost Moon, Sergeant Kreel of the Task Force 99 also known as the SCAR Troopers have faced the dianoga in the sewers.

Experienced chefs could make into a tasty breakfast dish, but overcooking it would activate the blood parasites in the fatty tissue, destroying the flavor.

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