Sea cucumbers are echinoderms in the Holothuroidea class. They are marine animals with a tanned skin and an elongated body with a single gonad.
They are on the bottom of the seas and oceans all over the world. There are a number of species that people are looking for consumption.
Like all sea cucumber echinoderms have a bone skeleton beneath the skin and a lime ring. In some species, the limestone ring and the skeleton are missing.
Sea Cucumber’s Food
Sea cucumbers are generally necrophagous, feeding on debris from other animals. The diet also contains plankton and organic matter in decomposition.
Some species are positioned in water streams and fish with tentacles. Many species possess esophagus and stomach. The intestine is long and cohesive.
Sea Cucumber’s Aspect
Sea cucumbers usually have lengths between 10 and 30cm. The smallest sea cucumber is only 3mm, and the largest one can reach 1m.
Their body varies from almost spherical to worm-like and unlike other echinoderms, not pre-weapons. At one end is the mouth while at the other end is the anus.
A remarkable feature of these animals is the collagen that forms the body wall. They can sneak in different forms due to this performance of being able to liquefy.
To be safe it keeps his body hard permanently. They can be found in large numbers on the depths of the water. At depths greater than 9 km the sea cucumbers represent 90% of the macrophage.
Their body is made of hard gelatinous tissue with unique properties, which gives them the possibility to live at such great depths.
Cucumbers have no brain. A neural ring surrounds the oral cavity and sends nerves to tentacles and pharynx. The animal is able to survive if the nerve ring is surgically removed, demonstrating that it has no vital role in coordinating the nervous system.
Most species do not have distinct sensory organs, although there are various nerve endings scattered through the skin that give the animal a sense of touch and sensitivity to light. Sea cucumbers extract the oxygen from the water near the breathing trees that are inside the anus, so they breathe draining the water through the anus, extracting the oxygen, then exhaling the water.
Sea Cucumber’s Behavior
Sea Cucumbers communicate with each other by sending signals through the water. When needed, when scared or attacked, some species release toxic chemicals.
This way to protect these toxic chemicals like soap can kill any nearby animal. In shallow waters, sea cucumbers form dense populations.
New Zealand’s brewed lives on the rocky walls of the southern island where the population often reaches densities of 1,000 animals per square meter. For this reason, such an area is called simply strawberry field.
Sea Cucumber’s Reproduction
Most sea cucumbers multiply by releasing semen and eggs in the ocean. Depending on the conditions, an organism can produce thousands of gametes. The reproduction system consists of a single gonad.
At least 30 species fertilize domestic eggs. The egg is then inserted into a bag in the adult body. He gave birth to him through a rupture in the wall near the anus. In the other species, the egg develops by swimming free in the form of a larval 2-3 days with a length of only 1mm.
Indigenous Australians were trading in southern China’s markets with sea cucumbers. This contact is the prime example of trade between the Australian continent and the Asian continent.
There are many species of sea cucumber that are harvested and dried for export to be used in Chinese cuisine. Some cucumbers are said to have healing properties.