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Evisceration is a method of autotomy involving the ejection of internal organs used by animals as a defensive strategy. Sea cucumbers (Holothuroidea) eject parts of the gut in order to scare and defend against potential predators such as crabs and fish. The organs are regenerated in a few days by cells in the interior of the sea cucumber. [1][2]
Thelenota ananas, a giant sea cucumber from the Indo-Pacific tropics. Sea cucumbers are echinoderms from the class Holothuroidea (/ ˌhɒləˌθjʊəˈrɔɪdiə, ˌhoʊ -/ HOL-ə-thure-OY-dee-ə, HOHL-). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the sea floor worldwide.
Stichopus japonicus var. typicus Théel, 1886. Stichopus roseus Augustin, 1908. Apostichopus japonicus is a species of sea cucumber in the family Stichopodidae. [2] It is found in shallow temperate waters along the coasts of south east Asia and is commonly known as the Japanese spiky sea cucumber or the Japanese sea cucumber.
Colochirus robustus, commonly known as the robust sea cucumber or the yellow sea cucumber, is a species of sea cucumber in the family Cucumariidae. It is found in shallow seas in tropical parts of the central Indo-Pacific region. C. robustus belongs to the class Holothuroidea, a group of echinoderms called sea cucumbers and known for unusual ...
The sea cucumber will be fully regenerated within 144 hours of transection. If a transection of a sea cucumber is made posteriorly to the crossover point, then the esophagus, the stomach, and the intestine will all be represented in the final form of the sea cucumber. Similar processes as regeneration of an anterior transection will occur, and ...
Eupentacta chronhjelmi (Théel, 1886) Eupentacta quinquesemita is a species of sea cucumber, a marine invertebrate with an elongated body, a leathery skin and tentacles surrounding the mouth. It is commonly known as the stiff-footed sea cucumber or white sea cucumber, [2] and occurs on rocky coasts in the northeastern Pacific Ocean.
Astichopus multifidus is a robust, soft-bodied species growing to a maximum length of 40 cm (16 in) and width of 10 cm (4 in). Both its dorsal and ventral surfaces are uniformly covered with hundreds of tube feet, those on the dorsal surface being extended into papillae, fleshy conical projections about 1 cm (0.4 in) long with tube feet at their tips.
Bohadschia argus has the same roughly cylindrical body plan shared by most sea cucumbers. On average, it measures approximately 36 cm (14 in) in length and 1.8 to 2.2 kg (4.0 to 4.9 lb) in weight, with a maximum recorded length of 60 cm (24 in). Its tough outer body wall, around 10 mm (0.39 in) in thickness, is firm and leathery to the touch.