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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]
Sea cucumbers can be found in great numbers on the deep seafloor, where they often make up the majority of the animal biomass. [17] At depths deeper than 8,900 m (5.5 mi), sea cucumbers comprise 90% of the total mass of the macrofauna. [18] Sea cucumbers form large herds that move across the bathygraphic features of the ocean, hunting food.
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 ...
Cucumaria quinquesemita Selenka, 1867. 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 ...
Holothuria perviax is a gray or brown sea cucumber with red-brown papillae and white tube feet for locomotion. [2] Its body is elongated with an oral-aboral orientation and can grow up to 30 centimeters. [1] It has a soft epidermis and a somewhat bumpy body. Its mouth is surrounded by thin branched tentacles [2] with poorly formed spricules ...
The Holothuriidae family, which the Actinopyga varians is a part of, is are known to have thick fleshy bodies and rows of tube feet. Papillae, which are blunt projections, cover the body. Their spicules are shaped like tubes and although most species in the Holothuriidae family are able to eject cuvierian tubules in self-defense, the genera ...
Holothuria thomasi, the tiger's tail, is a species of sea cucumber in the family Holothuriidae. Although it is the largest sea cucumber known in the western Atlantic Ocean, it is so well camouflaged that it was 1980 before it was first described. [3] It is placed in the subgenus Thymiosycia making its full name Holothuria (Thymiosycia) thomasi.
Holothuria atra is a sea cucumber that can grow to a length of 60 centimetres (24 in) but 20 centimetres (7.9 in) is a more common size. It has a smooth, pliable, entirely black skin which often has sand adhering to it, especially in smaller individuals. The mouth is on the underside at one end and is surrounded by a fringe of 20 black ...