? Acanthaster planci – Definition and Explanations


Purple Acanthaster
Dominion Animalia
Branch Echinodermata
Embr. Eleutherosa
super class Asterozoa
Class Asteroidea
Place an order Spinulosidase
Bottom line Leptognathina
Family Acanthasteridae
gender acanthaster
Binomial name (In taxonomy (botany, zoology, etc.) binomial name or binomial…
Plan of Acanthaster
Linnaeus, 1758

L’Purple Acanthaster (Plan of Acanthaster), is also called Crown of Thorns “, a species (Species in life sciences (from Latin species, “type”…) invasivestar (A star is a celestial body that emits light autonomously, like a…) of the sea (The term sea encompasses several realities.) of color (Color is the eye’s subjective perception of one or more wave frequencies…) red (Red meets different definitions depending on the chromatic system we use…)predator coral (Coral is an animal of the phylum Cnidaria, it usually lives in colonies…).


It has hairs on it everything (The whole, understood as the whole of what exists, is often interpreted as the world or…) body to defend itself. Its height can reach 40 cm. Diameter (In a circle or sphere, a diameter is a line segment through the center…) and has 12 to 19 radiating arms around (Autour is the name given by French bird nomenclature (update)…) from the body. He can move speed (We notice 🙂 20 meters per head hour (Time is the unit of measure 🙂.

Contact with its spines causes acuteness pain (Pain is a sensation felt by an organism, its nervous system is a…) nausea and vomiting, which may last four hours. Very often around the region point (graphic) contact becomes inflammatory with some persistent erythema and edema days (A day or day is the interval between sunrise and sunset; it…).

coral predator

Corals and their predator (A predator is a living organism that kills its prey for food or…)

It feeds exclusively on coral, against which it has great destructive potential.

It is a wild predator of corals (a coral eater) climbs the rocks and feeds on them stomach (Stomach (in ancient Greek στόμαχος)…) on the polyps, releasing its digestive enzymes and then swallowing the liquefied tissue. only one individual (WikiDictionary is a free and open source dictionary project similar to Wikipedia (both…) can destroy up to 6 m² of coral per year. one massive (Can be used as a mass word 🙂 coral in good condition can support 20-30 Purple Acanthaster per hectare, but this number (A number is a symbol used to represent numbers.) now largely obsolete in many placesIndonesia (Indonesia, official name is the Republic of Indonesia (in the Republic of Indonesia…)especially north (North is the cardinal point against south.) the big one Island (An island is a piece of land surrounded by water, be it a river or…) of Sulawesi (Sulawesi (also known as Celebes) is an island in Southeast Asia…) andarchipelago (An archipelago is a group of islands relatively close to each other. Proximity…) of Moluccas (The Moluccas are an archipelago east of Indonesia and make up the area of ​​…).

At first, they kept a distance from each other and fed only at night. But in recent decades, they have become commonplace.

In times of famine they may live on their provisions and observe more than six fasts month (A month (Lat. mensis from the word “month”, formerly from the word “menstruation” in the plural) is a period of time…).

Place of residence

Since then, it has been found on coral reefs in the tropics The Red Sea (The Red Sea (Arabic: ?????? ?????? Bahr el-Ahmar) is an intracontinental sea of ​​the ocean…) up toIndian Ocean (The Indian Ocean covers an area of ​​75,000,000 km². It is limited to the north…) andPacific Ocean (At 180,000,000 km², the Pacific Ocean is the largest ocean…) and all along the Pacific coast of Panama.


Peptide toxins have been identified in Acantaster Planci. Interestingly, their sequence is relatively close to human DNAse II.

Population explosion

Their population is this starfish species the sea (The term sea encompasses several realities.) It has increased since the 1970s and is partly responsible for the decline of corals, particularly at the level of the Great Barrier Reef in Indonesia. The don’t shoot (Multiplication is one of the four operations of elementary arithmetic…) A particularly important region for these predators is the “coral triangle” in the Pacific Ocean biodiversity (Biodiversity is the natural diversity of living organisms. Appreciated…) worries marine experts biology (Biology, commonly called “bio”, is the science of life…) the sea, especially since three quarters of marine species are concentrated in this area the world (May refer to the word world 🙂 including more than 600 species of coral.

There are other theories about this population explosion dispute (Debates are (constructive) discussions on a pre-announced specific or substantive topic…) in the world scientist (A scientist dedicated to the study of a science or sciences and…) do it again anger (Rabies is a serious viral disease that affects mammals, including humans. It…). Here are the key assumptions:

  • Overfishing or even extinction of their prey, such as the giant newt (Charonia tritonis), a gastropod mollusk sought by tourists for its beautiful shell.
  • Reproduction may be the result of a natural cyclical process related to the reproduction rate of these animals. theory (The word theory comes from the Greek word theorein and means “to think, observe,…” Based on the fact that Australia’s Great Barrier Reef saw an invasion of Purple Acanthaster in the 1970s and 1980s, but thenAustralia (Australia (officially the Commonwealth of Australia) is a country…) has responded effectively by organizing collection campaigns (private and public), while Indonesia has not yet implemented sufficient means to do so. control (The word control can have several meanings. Inspection can be used as a synonym of the words of…) of situation (In geography, situation is a concept of space that allows for the relative location of a place…).
  • The contamination (Pollution is defined as making the environment unhealthy. Definition varies by…) resulting from the daily waste of urban agglomerations.

However, this population explosion appears to be largely due to the development of agriculture and the resulting algae. food web (the term “trophic” refers to anything related to …).

As starfish eggs drift long distances, the destruction is not at the spawning site, life (Life is a given name 🙂. However, few marine animals feed on this starfish equipped with poisonous stings, but there are still a few, such as: triton mollusk, juveniles and a species of shrimp that feed on various fish. Fishes (Pisces is the sign of the zodiac where the Sun passes on March 12-18…) coral reefs (especially Napoleon) that feed on these larvae.

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