Cnidaria Essay

Born into chaos Cyntoia Brown, has lived a tragic life full of unfortunate events. Going from guardian to guardian until finding a safe haven with Ellenette Brown who would be the woman Cyntoia would learn to call mother. Stability wasn’t something Cyntoia was accustomed to nor something she experienced much of. Her childhood or lack off mold her into the individual who would at 16 murder a man, she believed was going to harm her, rob him of his possessions and later leave the premises in his vehicle and call the cops to report the homicide because she didn’t want him to be alone. Her train of thought and actions speaks drastically of her innocence. She did not mean to kill Johnny Allen nor was it her intention that night on August 6, 2006.

“Everything in Australia is trying to kill you, haven’t you heard?” (Rosalind James). Physalia, or Portuguese Man of War, is a salt water species of hydrozoa that thrives in dead zones of tropical and subtropical waters. The animal is often confused with a jellyfish, but it actually is a siphonophore. Blue Bottle, Physalia, is not just a multicellular creatures called zooids. The zooids work together to provide defense, help with feeding, to produce offspring, find a safe habitat, and use all the tools necessary to live a full life. While movement and shape are uncontrollable, they play a vital role in the creature living. The Portuguese Man of War is a beautiful creature that plays in an important role in the ecosystem

Moon Jellyfish are in the “Animalia Kingdom, Phylum Cnidarian, Class Scyphozoan, Order Semaeostomeae, Family Ulmaridae, and Genus Aurelia” ( Myers, 2016 ; Espinosa, ; 2016 ; Parr, 2016 ; Jones, 2026 ; Hammond, 2016 ; Dewey, 2016). The morphological description of Cnidarians are corals, sea anemones, jellyfish and hydroids. These cnidarians form a diverse phylum that contains ~9000 species, which live in aquatic (predominantly marine) environments. The phylum-defining trait of Cnidaria is the stinging cell, the nematocyte an extrusive organelle used for predation, adhesion and defense (Holstein, 1981; Lengfeld et al., 2009; Tardent and Holstein, 1982) (Steele and Technau; 2011). Also, this phylum, Cnidarians, are divided into two groups, “Anthozoa (sea anemones, corals and sea pens), which live as

Most reef-building corals contain photosynthetic algae, termed zooxanthellae, that live in their tissues. The corals and algae have a mutualistic association. The coral provides the algae a environment and compound

Coral reefs exist all over the world and are generally known as being one of the most diverse, intricate and beautiful of all existing marine habitats. They have many varying structures which are developed by algae and are symbiotic with various reef building corals which are referred to as, zooxanthellae (algae). There are many other factors such as, coralline algae, sponges and other various organisms that are combined with a number of cementation processes which also contribute to reef growth, (CORAL REEFS, 2015).

There are many Cnidarians that live and thrive in our tropical waters. Although most are harmless to humans, there are some that can kill you in a matter of minutes. The Cnidarians defend themselves with their stinging cells called nematocysts. When a predator or threat comes too close and brushes against its tentacles, it injects toxins into the blood stream and often effecting the nervous system. In most cases, if a very dangerous jellyfish is spotted along a stretch of beach, the life guards will close down that beach.

Marine biologists that have studied cephalopods claim that their subjects even have personalities and “that octopuses engage in play, the deliberate, repeated, outwardly useless activity through which smarter animals explore their world and refine their skills” (Scigliano, 2003). One scientist claims that her octopus even “bubble surfs” by spreading his mantle out and letting the aerator jets from his tank run under his body (Scigliano, 2003). .

It has been rumored that are extraordinary beings on another familiar planet close by our home of Nacirema, and it is our goal as the Interplanetary Nacirema Research Center team to investigate the situation. We plan to focus our trip on the specific coordinates that the University of Connecticut campus lies on, and being the curious creatures we are, we plan to delve into specific areas within this concentrated area. We will be studying the way both males and females conduct their everyday lives in terms of living, learning and communicating. Through our research, we plan to lighten up the mysteries about this foreign species and enable ourselves to communicate

Crayfish (Procambarus clarkii) are crustaceans that are similarly related to crabs, lobsters and shrimps. They live in partly salty water (brackish water), rivers, ponds and are considered omnivores because they feed on small fishes, plants, detritus, mollusk, and other small invertebrates. Crayfish have a hard-calcified exoskeleton which is typically made of structural polysaccharide called chitin. This calcified exoskeleton must shed for the crayfish to grow (Fitzgerald, 2006).

A coral structure is actually made up of hundreds - thousands of tiny little animals all growing together as a colony. These polyps are the makers of the coral reef and have accumulated over thousands of years to make up the largest living structures in the world. The anemones, which go along with the corals, are typically partnered with clownfish. In this relationship both animals work together in order to benefit each other. The anemone will provide protection for the clownfish, while the clownfish provides food for the anemone (seasky).

Illiana Cardona,105, of Blackfoot, Idaho, recently passed away on November 24, 2105. She passed peacefully in her sleep after finishing her extensive research essay that held the answer to cure all known and unknown diseases. “She was a real fighter as well as stubborn,” Avenir “Ave” Mari told reporters after announcing his wife’s death,” It took me years to convince her to marry me.”

They have gills covered by an operculum that increases respiratory efficiency by creating negative pressure that both draws and pushes water across the gills. They have a gas-filled pouch for gas exchange in low-oxygen environments that contributes to buoyancy. A few species use diffusion across their skin.

The barnacle attaches itself to the substrate upside down thus the positioning of the cirri to capture food. Barnacles contain hard exoskeletons made out of chitin. (Refer to appendices for meaning of chitin) and covered by an external layer of calcium carbonate.(Fig 3.5)

Cnidarians (or coelenterates), including sea anemones, jellyfish, and corals, are built mostly of sheets of cells, and they exploit the large surface area of the

     Coral reefs are one of the oldest types of living systems on earth, and certainly one of the most spectacular (Goreau, 1987). They are massive underwater structures formed by the limestone skeletons of tiny invertebrate animals. Reefs house a greater diversity of body forms, chemistry, and animal phyla (thirty-two compared to the eight that inhabit the most biodiversity ecosystems on land). Phyla comprise the second largest category of living things, after kingdoms.