Sea cucumberclass Holothuroideaany of 1, species of marine invertebrates that constitute a class within the porn stars in italy Echinodermata.
The soft cylindrical body, 2 to cm about 0. The internal skeleton is reduced to numerous distinctively shaped, tiny calcareous structures ossicles in the skin. Most species have five rows of tube feet extending from mouth to anus.
Are sea cucumbers vegetables?
The anal opening is used for both respiration and cucumber wastes. The 10 or more retractile tentacles surrounding the mouth are used for taking food mud containing nutrients or small aquatic animals or burrowing. Locomotion is usually sluglike, although some deepwater species can swim.
Many sea cucumbers can expel their internal organs through the anus and grow new ones. This may be a device for escape from a predator, or it may occur for physiological reasons. Some species also expel specialized sticky filaments that ensnare or confuse an enemy.
Sea cucumbers shelter pearlfish Carapus species in the anal cavity, with the head of the fish extruding. A number of sea cucumber species exude a toxin search is lethal to small animals but not to humans; South Sea islanders place sea cucumber juices in water to kill or stupefy fish.
Sea cucumbers are found in all oceans, mostly in shallow water but sometimes at depths of many thousands of metres.