Jellyfish (commonly referred to as sea jellies) are free-swimming marine organisms with bell-shaped bodies and tentacles, lacking brains, hearts or teeth – instead relying on an elaborate network of nerves for sensory information and coordination.
Turritopsis dohrnii jellyfishes can evade death by repeatedly switching back and forth between polyp stage and adult medusa form – an action known as transdifferentiation.
1. They Reduce Stress
Recent research examined the stress response of helmet jellyfish. Scientists wanted to see how this species responded to simulated sediment plumes, so they attached soft robotic “fingers” that could slowly curl around their bodies using hydraulic pumps and uncurled them again when reversed by reverse-pumping; after this brief moment of pasta-noodle entrapment the animals seemed fine but likely experienced temporary stress from being bound so closely together for so long.
Jellyfish are some of the oldest survivors on our planet, thriving across every ocean and even becoming invasive in certain areas. As one of the simplest multicellular organisms with no brain or lungs but well-organized tissues, jellyfish reproduce asexually while remaining free-swimming marine creatures that float on top of the water surface.
Jellyfish contain nerves at the bases of their tentacles and an intricate network of neurons running throughout their bodies, as well as statocysts – balance organs which enable them to maintain their position in water – statocysts enable jellyfish to stay upright when swimming through waves, while their bells contain special cells called rhopalia which detect changes in light intensity or changes.
Jellyfish have evolved to live even in the deepest waters, but to stay alive they must eat to fuel their bodies. Jellyfish also need somewhere to store the food they collect, with special sacs that can hold up to 1,000 times their bodyweight in storage capacity. In order to reposition themselves as needed, tentacles, mouth, and eyes can move independently as part of a complex web structure that holds them together.
Some species of jellyfish are safe for human consumption and offer essential nutrients like collagen, B vitamins, iodine, omega 3 and 6 fatty acids, antioxidants and more. But others can cause allergic reactions; therefore it is wise to avoid eating dangerous varieties, which contain deadly stinging cells called nematocysts that produce toxic stings which may cause respiratory distress, allergic reactions, numbness/tingling sensation, vomiting and stomach pains when inhaled directly. Jellyfish are also used as artificial skeletons during medical and surgical procedures and as protein source used when creating fake skin replacement for burn victims as well as ingredients in many cosmetic products.
2. They Increase Oxygen
Jellyfish are striking aquatic animals known for their bell-shaped domes and stinging tentacles. As members of the Cnidarian class of invertebrates – also comprising sea anemones and corals – jellyfish tend to follow the laws of life and death – though one individual seems to have discovered immortality!
Researchers studying Turritopsis dohrnii, a small marine venomous jellyfish species, discovered that its polyp form allowed it to escape death when old or damaged, according to scientific experiments conducted on mature medusae that fell to the bottom of a jar and reverted into polyps without fertilisation or larval stages; over time these polyps grew back into medusae again; earning this species its nickname of “immortal jellyfish.” Over two years’ observation by researchers revealed colonies looping through this cycle – becoming biologically immortal organisms!
Although jellyfish might appear strange and alien-like, they play an integral part of ocean ecosystem. Their key roles include maintaining equilibrium across varying water depths and conditions through feeding on organic matter that they decompose; providing oxygen for marine environments via breathing process; serving as propulsion through contractions in their bells to propel themselves forward, and their tentacles’ stinging cells deter predators or subdue prey through subduing or protecting against them; they provide major amounts of oxygen to marine environments by decomposing organic material they consume; being major sources of oxygen supply for marine environments they help regulate.
Though most of a jellyfish’s body consists of water, they still possess an elaborate digestive system consisting of stomach and intestines for digesting both plants and animals they consume. Furthermore, their respiratory system absorbs oxygen through cell walls on their surfaces for oxygen absorption.
Jellyfish are notorious hitchhikers, spreading around the world through human activities such as shipping. When conditions allow it, vast swarms may form that pose health threats to humans via their stinging cells as well as block fishing gear, power plants and desalination facilities that draw water from the oceans.
3. They Reverse Aging
When an adult jellyfish (or medusa) becomes injured or dies, its lifecycle typically returns to that of its baby polyp stage – this typically involves it shrinking inward, reabsorbing tentacles, and floating to rest as undifferentiated cells on the seafloor.
However, Turritopsis dohrnii jellyfishes have the ability to escape this cycle of life and death. Scientists who studied these creatures found that when starved of nutrients or starvation occurs, medusae can actually reverse their cellular processes and become immortal polyps again.
These tiny creatures are notorious for hitching rides on ships, taking advantage of ballast water used by cargo and cruise vessels to maintain stability at sea. Being immortal allows these tiny creatures to survive multiple ocean crossings while sexual reproduction allows for rejuvenation; in fact, scientists have managed to keep colonies of these creatures going back-and-forth life cycles within lab settings for two years!
4. They Make You Look Younger
Turritopsis dohrnii jellyfish species is among the world’s most curious lifeforms, having made a remarkable journey worldwide by hitchhiking into ballast water of ships. Futurism reported on a creature no bigger than your pinky finger nail that exhibits an intriguing characteristic: when exposed to stress or damage, it has the ability to reverse its own aging process, according to reports. Scientists now understand how this works – they compared T. dohrnii’s genes with those of an ordinary jellyfish species, and discovered that its immortal counterpart has double the number of genes which promote repair and protect DNA compared to normal species.
