This animal can lose its gut—and grow another
A sea cucumber can do something startling under stress: some species eject internal organs, including the intestine, and later rebuild them. The process is called evisceration. It can follow a predator encounter, low oxygen or other stressful conditions.[1]
AI-generated explanatory illustration, not a photograph. Schematic details are not to scale. · Source
The rebuilt gut is new tissue. In the well-studied sea cucumber Holothuria glaberrima, a replacement intestine develops from the remaining mesentery—the tissue that supported the old gut. Cells change their state, multiply and reorganise as the tube is reconstructed.[2]
There is no single recovery clock. The route of organ loss, the tissues affected and the time needed to regenerate differ among species. This is a real injury and repair process, rather than an animal becoming instantly empty and instantly whole again.[3]
Historical book illustration, AI-assisted colour remaster. Colours are interpretive. · Source
The Ocean World recorded both organ loss and recovery, but wrapped the account in imagined grief and intention. The biology is extraordinary enough on its own: an adult animal can rebuild a major part of its digestive system.[4][5]
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