|Planet of origin||Decapod 10|
|Known members|| John A. Zoidberg|
|First appearance||The Series Has Landed|
Decapodians are essentially humanoid crustaceans. They have an exoskeleton shell, claws for hands, four seemingly prehensile appendages above their mouths and no hair. They all speak with Yiddish accents, possibly because of these appendages. They аlso possess a fin-like crest that appears when they are enraged or aroused, as well as an ink gland similar to the Earth octopus. They have been known to use their ink while writing letters that require a personal touch.
Decapodians also have a strange gland that produces foul odors when they are bored. Upon ingesting dirt, they cough up a kind of pearl, not unlike clams. They must also have gills as they are capable of breathing underwater.
They also seem capable of eating and digesting almost anything even vaguely organic, from human food, to garbage, all the way to wood. They also have freshwater and saltwater stomachs which they can vomit separately from. They can apparently go for several days without eating. Interestingly, they can still survive and stand upright without their shell, suggesting an endoskeleton as well as a shell intended simply for defensive purposes.
Internally, Decapodians are cold blooded and have a number of redundant organs, such as four hearts, that may be removed. Apparently, Decapodians are capable of surviving multiple dismemberments, as Zoidberg demonstrated in Roswell that Ends Well, where he has several of his organs surgically removed after a series of vivisections. He gets them back and reinserts them later with no long-term consequences.
They are also shown being able to survive missile attack in A Taste of Freedom.
Life CycleEditDecapodians mature through a long series of larval stages before attaining the humanoid, fully grown form. Apart from this complex life cycle, they have very long lifespans. They begin life as a small immobile creature from which asexually fragmented siblings can separate, each with their own distinct personality. A later stage resembles a parasitic lamprey, followed by a large clam inside which the head is visible. The next oldest form resembles a trilobite. Other stages included an urchin-like state and later a cuttlefish-like appearance. A prominent Decapodian, Dr. Zoidberg, reverted through all of these early "larval" life cycle stages of his species after being exposed to a youth tar. When Decapodians mate, they quickly die off, leaving their young to grow without parents to guide them.
It is implied though, that some Decapodians refrain from mating to help keep their civilization running: they either adopt young into their family or only certain members of families mate so the young do not have to become part of a new family. Zoidberg has revealed during flashbacks to have been raised by a female he calls his mother. It may be that when the Decapodians die, their bodies turn into coral, starting their lives over again and making more of their species.