This website uses cookies to ensure you have the best experience. Learn more

Overview Of Jellyfish Essay

1064 words - 4 pages

The word “jellyfish” is often used to describe animals that are made of gelatinous materials. Some types of jellyfish sting (called medusae) and others do not (called a salp). When a huge amount of plants or animals show up suddenly, scientists call it a “bloom”. Jellyfish often bloom, which causes issues for fisheries and tourism. A common analogy used to describe the delicate way jellyfish pounce through the water likens the jelly’s movements to ‘a simple form of jet propulsion’.
Jellyfish have large appetites, including phytoplankton, copepods (zooplankton), larvae, and sometimes, even other jellyfish. When the jellyfish are moving in ‘blooms’, they will eat literally anything that’s in the water/in their way. A jellyfish has a simple digestive system with only one opening. Fun fact: jellyfish are made up of more than 95% water.
The expected life span of a jellyfish is one year, typically starting with a spring birth and growing into adulthood during summer. By the end of summer, the jellyfish’s delicate skin is quite damaged by the end of summer, causing problems, which ultimately lead to death. However, scientists recently discovered an “immortal” species of jellyfish, which reverts back to a larval state as it ages, causing “immortality”.
Though it is rare for a jellyfish to reproduce in captivity, it is not uncommon for jellyfish to reproduce in the wild. They are typically found in coastal waters of all zones, but mostly warm or tropical waters. They are even found in brackish water with as low a salt content as 0.6%. Their biomes are reefs, tropical coastal, and freshwater lakes. They are also found in both oceans and inshore seas. Jellyfish can withstand temperatures as low as -6 degrees Celsius and as high as 31 degrees Celsius.
Though jellyfish are wildly liked and eaten in countries all over the world, there are many organizations set up for the conservation of the jellyfish species. Jellyfish are slowly becoming extinct for many unknown reasons, but water pollution is one of the reasons, and so is “hobby killing”.
Jellyfish are the major non-polyp form of the phylum Cnidaria. They are typified as free-swimming marine animals consisting of a gelatinous umbrella-shaped bell and trailing tentacles. Their scientific name is Medusozoa, their rank is subphylum, and their classification (also phylum) is Cnidaria. Jellyfish have no brain, no blood, and a very limited nervous system, used only to catch and kill their prey or food. There is about 200 different species of True Jellyfish, including one species that is literally immortal.
For the conception of jellyfish, a male jellyfish releases his sperm into the water that surrounds him, and then the sperm swim into the mouth of a female jellyfish. The sperm then fertilize the female’s eggs and eventually form an embryo. The typical amount of baby jellyfish born from a single mother at one time varies on the species and type of jellyfish. Jellyfish have a difficult and complex life...

Find Another Essay On Overview of Jellyfish

phase diagram Essay

4456 words - 18 pages Introduction: Chemical equilibrium is a crucial topic in Chemistry. To represent and model equilibrium, the thermodynamic concept of Free energy is usually used. For a multi-component system the Gibbs free energy is a function of Pressure, Temperature and quantity (mass, moles) of each component. If one of these parameters is changed, a state change to a more energetically favorable state will occur. This state has the lowest free energy

Revolutionary Work of Art Essay

1890 words - 8 pages Walter Benjamin emphasizes in his essay, “The Work of Art in the Age of its Technological Reproducibility” that technology used to make an artwork has changed the way it was received, and its “aura”. Aura represents the originality and authenticity of a work of art that has not been reproduced. The Sistine Chapel in the Vatican is an example of a work that has been and truly a beacon of art. It has brought a benefit and enlightenment to the art

Enlightenment Thought in New Zealand Schools

1594 words - 6 pages In this essay I will be looking at how the political and intellectual ideas of the enlightenment have shaped New Zealand Education. I will also be discussing the perennial tension of local control versus central control of education, and how this has been affected by the political and intellectual ideas of the enlightenment. The enlightenment was an intellectual movement, which beginnings of were marked by the Glorious Revolution in Britain

Psychological Egoism Theory

2240 words - 9 pages The theory of psychological egoism is indeed plausible. The meaning of plausible in the context of this paper refers to the validity or the conceivability of the theory in question, to explain the nature and motivation of human behavior (Hinman, 2007). Human actions are motivated by the satisfaction obtained after completing a task that they are involved in. For example, Mother Teresa was satisfied by her benevolent actions and

How Celtic Folkore has Influenced My Family

1587 words - 6 pages Every family has a unique background that influences the way they live and interact with other people. My parents, who emigrated from Ireland to the States with my three brothers in 1989, brought over their own Celtic folklore and traditions that have helped shaped the way our family operates and lives. One aspect of folklore that has helped shape my family dynamic is the Celtic cross—both its background and what role it has played in our lives

Julia Margaret Cameron

1406 words - 6 pages At a time when women were looked upon as being homemakers, wives, mothers and such the late 1850's presented a change in pace for one woman in specific. Photography was discovered in 1826 and soon after the phenomenon of photography was being experimented with and in turn brought new and different ways of photo taking not only as documenting real time, but also conceptualizing a scene in which an image would be taken. Julia Margaret Cameron will

Evaluation of School Improvement

1403 words - 6 pages climate of the organization. Dr. Hunter indicated the learning environment should be positive, inviting, friendly, clean, and safe. Visitors should feel welcomed as they enter the school building. Dr. Hunter noted positive learning environment celebrates the diversity of the school population. The positive learning environment reflects the culture, belief, and values of the community, which is woven into the fabric of the school curriculum

Case Study: The Benefits of Animal Testing

1757 words - 7 pages Nine year old Amy has already had a rough start in life. She was born with an abnormal heart that hinders her everyday activities. Amy is unable to keep up with kids her own age because she often tires out easily. As a consequence, she has very little friends and is often alone. Amy is forced to take different medications everyday just to survive. Amy’s life consists of medicine, doctors, and constant hospital visits. However, Amy is due for a

Myth and Magic: Realism in "One Hundred Years of Solitude"

1531 words - 6 pages “He enjoyed his grandmother's unique way of telling stories. No matter how fantastic or improbable her statements, she always delivered them as if they were the irrefutable truth” (Wikipedia, 2011). Experiences are particular instances of one personally encountering or undergoing something and in these moments of time life changes for the best or the worst and memories are formed. These recollections such as riding your first bicycle, going to

Adiponectin: a Novel Indicator of Malnutrition and Inflammation in Hemodialysis Patients

2384 words - 10 pages Objective Protein-Energy malnutrition (PEM) and inflammation are common and overlapping conditions in hemodialysis patients which are associated with increased risk of morbidity and mortality. Adiponectin is an adipocytokine which is exclusively produced by adipose tissue. Few studies in hemodialysis patients have demonstrated that serum levels of adiponectin were significantly higher in malnourished patients compared to well-nourished ones. The

The Congo Free State: A Legacy of Apathy, Exploitation and Brutality

2298 words - 9 pages brutally exploited the inhabitants of the Congo, while at the same time robbed Congo of wealth, as the rubber was “sold” to the Europeans at prices far below what the rubber was actually worth. Only when others, specifically the British and the Americans, revealed the horrible conditions of the Congo, did the Belgian government reluctantly take over control of Congo, but the damage was done. Scholars, such as Martin Meredith, state that Leopold

Similar Essays

Alfred Wegener's Continental Drift Essay

629 words - 3 pages Alfred Wegener was a German born scientist who, one day while looking at a world map, noticed that the coastline of the continents, separated by the Atlantic Ocean seemed to fit together like a jigsaw puzzle. This observation, later lead him to hypothesize that the continents were at one time connected. This hypothesis created a heated debate in the scientific world. I will use this essay to provide a brief overview of Wegener’s life, his

The Importance Of Bones Essay

1768 words - 7 pages . The evolution of bones is what allowed for the vast differentiation of multicellular life on Earth. Dating back somewhere around 635-545 million years ago life consisted of only soft-bodied creatures floating around in the ocean. These creatures resemble something like our jellyfish of today. So how did we get from jellyfish to modern-day humans with skeletons? Initiation of Bone Formation In Darja Wagner and Per Aspenberg’s article entitled

The Difference Between A Good Teacher And A Bad Teacher

1395 words - 6 pages The Good, the Bad, and the Teachers “Every kid starts out as a natural-born scientist, and then we beat it out of them. A few trickle through the system with their wonder and enthusiasm for science intact.” —Carl Sagan Did you know? America used to produce a 5-cent bill... A hummingbird weighs less than a penny... A jellyfish is 95% water... Giraffes have no vocal cords... The penguin is the only bird that can swim, but not fly... There are

When The Bubble Burst Essay

1539 words - 6 pages By the time I arrived state side from my second tour in the Middle East the housing bubble had already burst. I noticed a drastic change in the way that many of my friends and family were living. Several of my friends that worked in real estate had sold their boats and seconds houses. My own stock portfolio had lost a third of its value. My sister and her husband had defaulted on their home mortgage leaving them scrambling for a place to live. I