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Cool facts. Though cnidarians have been shown to possess and use similar developmental genes to bilaterians during larval development and polyp formation, little is known about genetic regulation of colony morphology in … Elkhorn coral received its common name due to its resemblance to elk antlers. But fast is relative in the coral world; a colony of staghorn coral may only grow four inches (10 cm) per year. In addition, coral reefs protect coasts from strong currents and waves by slowing down the water before it gets to the shore. The elkhorn coral’s complex large and thick green colored branches can reach a length of 6.5 feet (two meters). The elkhorn coral Acropora palmata is a branching, reef‐building species that inhabits shallow tropical Caribbean reefs. C) Algal species take the place of the dead coral, and the fish community is dominated by herbivores. Colonial reef-building corals have evolved a broad spectrum of colony morphologies based on coordinated asexual reproduction of polyps on a secreted calcium carbonate skeleton. A) Staghorn coral has been decimated by the pathogen, and Elkhorn coral has taken its place. This coral species was once abundant in the Caribbean, but is currently rare due to massive population declines over the past few decades that have been linked to climate change (Eakin et al., 2010). Staghorn corals grow fast to shade out other corals and gain more space on the reef. Like its thinner cousin staghorn coral, elkhorn colonies provide complex habitat for juvenile fish. It, along with elkhorn coral and star corals (boulder, lobed, and mountainous) built Caribbean coral reefs over the last 5,000 years.Staghorn coral can form dense groups called “thickets” in very shallow water. Without coral, the amount of carbon dioxide in the water would rise dramatically and that would affect all living things on Earth. Introduction. These outbreaks may be a result of overfishing of the crown-of-thorns starfish’s primary predator, the giant triton or they may be a natural phenomenon. Coral is also are very key in controlling how much carbon dioxide is in the ocean water. These starfish are known to be more successful at preying on large swaths of coral reefs when the corals are already stressed. Elkhorn coral grows into thick, robust branches and is the most important reef-building species in the Caribbean. A coral that occurs in the region is elkhorn coral (Acropora palmata). B) Key habitat for lobsters, snappers, and other reef fishes has improved. Photo 5/7 :Elkhorn coral and staghorn coral were once dominant coral species in the wider Caribbean. You will notice that each large blade ends with several axial corallites, which helps identify it as an Acropora coral. Staghorn coral is one of the most important corals in the Caribbean. Behind the reef front, more protected areas are occupied with more delicate species such as staghorn coral ( Acropora cervicornis ), finger ( Stylophora ), cluster ( Pocillopora ) and lace corals ( Pocillopora damicornis ). Coral decline over the last few decades has greatly changed the structure and functioning of coral reef ecosystems. However, over the last several decades these corals have suffered severe population declines due to disease, hurricanes, and coral bleaching events. Even recreational diving on reefs takes a toll: boat anchors break off coral heads, and corals die where divers kick or grab them. Rise dramatically and that would affect all living things on Earth most important corals in the water before it to. In the region is elkhorn coral ’ s complex large and thick green colored branches reach... Branches can reach a length of 6.5 feet elkhorn coral niche two meters ) Acropora palmata ) the amount of carbon in! 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