There are wrong beliefs about this marine creature, since people usually think that they are harmful to other marine species. Although sea stars live underwater and are commonly called "starfish," they … Currently, we know about 2000 different species of starfish and all of them inhabit the sea or the ocean. This is located in the middle of the oral disc; and it is strategically bordered by a peristomial membrane, which... Color and skin. The aquifer system can be considered as the main element of the displacing function of the sea star. Continue reading! On the one hand, water pollution wipes them out, as they can’t find a way to process the toxins and be able to breathe. Their ambulacra pieces allow them to trap their prey with their arms. Everything will depend on the class they belong to. In fact, the highest density of specimens is located in the tropical areas of the Indo-Pacific. The first reptiles evolved approximately 320 million years ago from the advanced four-li… Mega-venomous starfish and a turtle happy meal - Duration: 3:52. This animal belongs to the family of echinoderms. This is how we…, More and more people are deciding to get a pet chinchilla nowadays. It will kill them. Although they have a sort of protective system in their bodies, which is based on toxins, spines and grains that produce a rather bitter taste, nothing pleasant to the palate of these animals, they are dragged and devoured by them. These beautiful marine creatures face constant threats, since they are chased by a large number of predators, including sea lions, newts, crabs, seagulls and in many cases others starfish. A sea star can lose one or more arms and grow new ones. Decorating Aquariums : The best algae to decorate domestic aquariums…. At this age they finally become adults, with a life expectancy which ranges between ten and thirty years. As a result of all these properties, starfish have been the subject of numerous studies, attracting in an impressive way the attention of large pharmaceutical industries, ornamental and natural medicines. Main Characteristics of The Starfish Arms. Reproduction Characteristics. The digestive system of this marine species is composed of a mouth located in the stomach, which has the particularity to revert from an inner position to an outer one. In some varieties (Ranchu, Lionhead, Celestial, and Bubbleye), the dorsal fin is not present. See article Blue Starfish for further information about this species. However, there are some who inhabit cold and temperate waters. The starfish also lack of blood, but they have an aquifer vascular system, which transports salty water through the madreporite towards their alimentary routes to absorb nutrients. They can live up to 10 years. Starfish EARLY ALERT relies on reporting by the campus community to identify students who need additional academic support. Orange, yellow, different shades of green, perhaps blue, violet, gray, brown and even many colors at once, can be present in these beautiful creatures. Then, it goes through a rather short esophagus and two stomachs. On the underside of the starfish, they have what are called the tube feet, which possess suction cups. As far as the skin of this marine species, it is usually very strong, and it has a tissue which contains large amount of calcium. This aspect is observed quite clearly in starfish, whose body has five exactly equal points that are located around a central axis, perpendicular to the points. There are approximately 2,000 species of starfish, all of which live in marine waters of the ocean. Podia are small extensions of flesh which are operated by water pressure and muscles, and controlled by the nervous system of the echinoderm. The less weight a starfish has, the less life it will have. About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. Even though parameters for the administration of this potential natural medicine have not been established, it has been be proved that it will be an effective treatment to counteract diseases caused by bacteria, inflammatory type viruses, various types of fever and even asthma. All monarch larvae…, The scorpion is an arthropod directly related to the spider. This marine animal, known as a sea star, fulfills an extraordinary regeneration that has been one of its most significant properties. There are countries such as China where they consume this type of animal, and where it is considered a succulent dish as well as being coveted. This animal is also quite sensitive to touch. The starfish can avoid an unexpected arrival of a predator, since they have a system of sensory cells in their skin, that allow them to be attentive to light, marine currents, chemical bonds, among other aspects. Starfish can live at the bottom of the sea up to 20000 feet deep. 6. Most starfish are dioic, and they are sexually differentiated in males and females, although there are also simultaneous hermaphrodites which produce ovules and sperm at the same time. They almost always prefer coral reefs large agglomerations of algae, and stony places, at depths of even 6000 meters. Here are some critical characteristics of … The fact is that they can only be in marine environment, and if they stay out of these waters for a long time they could easily die, since their bodies have a system that helps them have an electrolyte control that only allows them to live in salty waters. One of the most colorful types of starfish is the royal sea star. 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