Decapodians

The Decapodians are a race of sentient lobster-like creatures, originating from Decapod 10. The importance of the Decapodians on Futurama stems from Dr. Zoidberg being a member of the species.

Decapodian society is often pictured in contrast to Earth. The Decapodians are ruled by the Decapodian Emperor. And while many indications of their society seems to suggest a totalitarian government, even though they have a democratic process.

Culture
Decapodian culture shows the traits of being authoritarian and they seem to be strict beings, who do not welcome change to their society. Despite the authoritarian sense in the species' members, many of them are known to flock to other worlds, perhaps in search of a less strict society. It can be assumed that Decapodian society isn't strict in format, but essence of its authoritarianism is uncanny, and as a result the sense stems to its citizens.

Decapodians live in buildings made of packed sand. Much of their infrastructure is based upon sea-based material and imagery. Decapodians often settle matters of honour and lesser matters such as whether abbreviations count in Scrabble during their ritual of Claw-Plach, a battle to the death before an audience.

Parenting
Parenting is perhaps one of the more complicated parts of Decapodian culture. And while clues are revealed during the course of the series, it remains unclear how exactly the parent-child combination works in Decapodian society.

In "Why Must I Be a Crustacean in Love?", it is revealed that when Decapodians passed on their genes, they die. But in order for the establishment of Decapodian society to make any sense, a former generation (or more generations) must remain behind to take care of the offspring, in order to teach them with the cultures of society, which means that Decapodian society must have a regular "reboot" of society.

Further evidence are introduced in "That's Lobstertainment!", when Zoidberg mentions to Harold Zoid, that he is the boy of Norm, Sam and Sadie. The "mother" shown in "A Taste of Freedom" can be assumed to be a parental figure, rather than Zoidberg's actual biological mother (who he could never have known, especially since she notes that his parents are in graves). A possible explanation can be that Norm, Sam and Sadie are all parental figures, who took care of Zoidberg among others. An alternative explanation is that two of the "parents" are his actual biological figures, and the last is his parental figure; either "Sadie" or "Sam[antha]".

Politics
Politics in Decapodian society seems at best complex. They are known to have an Emperor, but at the same time, they have a democratic process to elect new leaders. It is also possible that the elections are essentially a show for the citizens.

Despite the chain of leadership, Decapodian ambassadors are allowed to declare war upon other governments and lead the wars. For instance, Ambassador Mervin lead the war against Earth in 3003. The Decapodian Army's foremost advantage is their warships, but these unfortunately are expensive, so replacements for the warships, such as the Mobile Oppression Palace are built to maintain the oppression of newly conquered worlds. Unfortunately for Decapod 10, Dr. Zoidberg destroyed the Mobile Oppression Palace that was in place on Earth.

Anatomy
Like lobsters or crabs on Earth, Decapodians have no bones. Instead they have an exoskeleton&mdash;a hard, chitinous shell which gives their body the rigidity needed to move about. These shells&mdash;like seemingly most of their other organs&mdash;are not an integral part of the body, but are moulted and replaced when they grow too large (3ACV01). They may vary in colour from pink, red, or brown, and all hues in between. They have claws instead of hands and feet, and have a row of four small finger-like flaps that cover their mouths. The thorax has three ridges, possibly containing orifices, and ink pouches are set in the armpits. A blowhole is set on top of the head, and the males possess a decorative fin in the same place that can be erected at will in times of the mating frenzy. Internal organs are numerous and seem to be vestigial or redundant. There are, among others, four hearts, a gas bladder, an "empathy" bladder, a stink gland, two stomachs, one containing fresh water and the other containing salt water (vomiting from both of them is a sign of happiness), gonads in their necks, and a tiny brain in their rump, which takes over during the mating frenzy. Apparently Decapodians are very strong, and their claws are sharp enough to cut steel bars and similarly hard things (but not diamond filaments). Decapodians are cold-blooded, the blood appears to be light purple in colour. They also have an organ that gives off foul odors when they become bored.

Life Cycle
Decapodians go through many different stages during their lives. Starting off as tiny larvae in a puddle, they progress through no less than a dozen forms. (4ACV09) In their "Coral Form" their siblings bud off. In their mature form, Decapodians are bipedal humanoids.

Pearls
Like many Earth mollusks, Decapodians create pearls when irritants are introduced into their throats. These pearls are blue in appearance and can be used to make jewelry. (3ACV03)

Reproduction
As with life on Earth, female Decapodians carry eggs, which are fertilized by the males. Like many sea creatures, their survival strategy is to produce massive numbers of offspring, rather than to protect a small number of children until adulthood. Decapodians have no concept of love, and enter into relationships only for reproduction. When their mating season arrives, each male attempts to attract a female with an erotic display in the same place as the humans does their erotic display&mdash;the beach. Successful couples will participate in the mating frenzy. After participating in the frenzy, they die a gruesome death. This brings into question how Zoidberg knew his parents, but not enough is known to draw any conclusions (i.e., they may have been adoptive parents from another generation). Zoidberg also states that he is "Norm and Sam and Sadie's boy" (3ACV08), which implies Decapodians may have three parents, whether that be one biological and two adoptive or some other combination (or all biological), however it may also be coincidence, that three Decapodians picked up Zoidberg, which may also suggest that some children are taken care of, after they return to shore.it may also be that two parents are biological, and one adoptive who didn't get the chance to mate.

Characters

 * Dr. John Zoidberg
 * Edna
 * Harold Zoid
 * Ambassador Mervin
 * Hugh Man
 * Decapodian Emperor

Trivia

 * "Decapod" means "having 10 feet"&mdash;a common trait of crustaceans, though one the Decapodians lack in their mature, bipedal forms.
 * While they are confirmed to die after mating with each other, Yivo was able to mate with them without causing any known deaths. This suggests that they may be able to mate with members of other species without it resulting in their death.

Quotes

 * Dr. Zoidberg: Fry, it's been years since medical school, so remind me. Disembowelling in your species: Fatal or non-fatal?
 * Decapodian Emperor: Once invoked, the sacred tradition of Claw-Plach can not be taken back. It is a recent tradition, only 18 years old, but it is a tradition nonetheless.

Appearances
Note: Not all episodes featuring Zoidberg are listed, only episodes showing other Decapodians, or those revealing new information about the race.