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Jellyfish
Found in every ocean, jellyfish are not technically "fish." Jellies have an umbrella like structure that allows them to float beautifully in the water. Watch out though, some of them sting!
1,930 Questions
What is the binomial nomenclature name for a jellyfish?
A jellyfish is the medusoid stadium of animals belonging to phyum Cnidaria, subphylum Medusozoa, which include: * class: Scyphozoa * class: Cubozoa * class: Staurozoa* class: Hydrozoa (only some hydrozoans have a medusoid stadium, so not all of them have jellyfishes) * class: Polypodiozoa Jellyfishes scientific names are ruled by the ICZN (International Code of Zoological Nomenclature). Each species must be identified with the genus name followed by the specific name (binomial nomenclature).
What are the names of the groups Jellyfish travel in?
they call large groups blooms and small groups swarms
Yes they just touch the Betta fish to paralyze it and then eat.
Is a box jellyfish endothermic or ectothermic?
Because box jellyfish, as with all other cnidarians, do not have blood, or a circulatory system, they can not be considered "cold-blooded." However, they are ectotherms whose body temperatures are equal to the temperature of the environment, which is usually very warm, as almost all box jellyfish are restricted to tropical waters.
How big can jellyfish grow to?
Theoretically there is no limit to the size that a Echizen can grow.
The largest Echizen that I'm aware of, measured about 17 feet across. They are squat jellyfish, so their length is about the same size as their breath. But they still can look HUMUNGOUS next to a diver.
There are three factors that effect Echizen Jellyfish size:
1) Weightlessness. Creatures that live on land have gravity-based limits to their size. If they get too large they will crush their own organs and / or break their own bones and structural support. Creatures that live all the time in the water have no such limitations because their bodies are supported by the water they live in. This then gives most sea-creatures size limits based on how long they live, and how much they can eat.
2) Water Temperature: The Echizen Jelly cannot survive in cold water, so they have historically died when winter comes if they are as far north as Japan. So most cannot live even 1 year, creating a size limit based solely on the amount it can eat in about a year.
3) Abundance of Food:
a) The Echizen Jellyfish have no sence of being "full", as we do, and so will eat all of it's foodsource (zoe-plankton) that is available. Overfishing has depleated it's main rival for the plankton that it eats, leaving much more for the Echizen Jellyfish to consume than in the past.
b) Over the past 100 years or so, the amount of nutrients comming out of China's Yangtsee River has risen exponentially, causing a hypernutrification of both the river, it's estuary, and the surrounding seas. This (as we know) creates an environment that allows huge amounts of algie, sometimes referred to as an 'algie bloom' to occure, along with potentially fatal low oxygen levels that may kill off more of the plankton's prediters.
c) This hyperabundance of algie, which is the foodsource for the plankton, in turn creates a hyperabundance of the plankton which the Echizen Jellyfish eats.
4) Global / Oceanic Warming (climate change)
a) The oceans have been seadily warming every year for decades, which causes two things, allowing the E.J. to live longer and also to spread over more territory by moving further north each year, which has been well documented by the Japanese fishing industry.
b) If ocean temperatures continue to rise, the Echian Jellyfish will eventually be able to survive the winter in greater numbers, allowing them to grow even larger than ever before.
So: (Human Waste) + (Overfishing) + (Warmer Oceans) = Giant Jellyfish!
My husband told me how once as a kid he found a dead jellyfish and put it inside a plasticbag in a fridge. After a couple hours when he returned to check on it all that was left inside the bag was water. We started wondering can that actually happen, that jellyfish just turns into water, as well.
What is treatment for jellyfish sting?
The best treatment is:
Wash it with clean water. Do not rub it, as the tiny stinging cells will release more venom. After washing, apply household ammonia. You might also take a Benadryl (diphenhydramine) tablet to reduce the inflammation. (From a former ocean lifeguard.)
Which syllogism is likely true?
Goldie is a fish, and all fish live underwater, so Goldie lives underwater.
Are there box jellyfish in Israel?
Yes, the boxjelly species Carybdea marsupialis is found in the Mediterranean. C. marsupialis is also found throughout most of the tropical Atlantic, and is also found in the Pacific Ocean, off the coast of California and western Mexico. Unlike more famous boxjellies, like those of the genera Malo or Chironex, Carybdea marsupialis does not have a dangerous sting. Its sting only results in mild pain and temporary discomfort.
How many jellyfish are born at once?
Moon jellyfish are not fish: Fish are vertebrates and belong to phylum Chordata, while Moon Jellyfish are invertebrates belonging to phylum Cnidaria. Phylum Cnidaria comprises corals, sea anemones, sea whips, sea pens, hydras, Portuguese man-of-war and sea fan corals, along with Moon jellyfish. The members of phylum Cnidaria are multicellular, diploblastic (having two cell layers) radial symmetric organisms, featuring special microscopic cells called nematocysts or sting cells, which enable them to stun and capture their prey.
Moon jellyfish resemble floating mushrooms: Moon Jellyfish appear to be like floating mushrooms with a transparent, milky-white, or light purple, bell-shaped body from which numerous long, thread like arms called tentacles, branch out floating underwater like weeping willow branches. The bell shaped upper body can be as large as 18 inches, thereby giving the animal the appearance of a flying saucer. Hence, Moon jellyfish are also often termed as saucer jelly. The bell portion is further divided into eight parts or canals which further branch and reach the digestive system. The jellyfish has only one opening which serves as the mouth as well as the anus.
Moon jellyfish are 95% water: Moon Jellyfish do not possess brain, heart, blood, head, eyes or ears. They are 95% water and are basically a floating mouth and digestive system. They have a complex set of nerves that respond to stimuli, but they cannot think. They do not possess any lungs, gills or any tracheal system, and receive oxygen simply by diffusion through a thin membrane. As they have a large bell shaped body, the surface area available for diffusion is also large.
Moon jellyfish have two main stages of life: Two dividions or stages of body plan is seen in the lifetime of a Moon jellyfish. The first type or stage is called the polyp stage and the second is the medusa stage. The first stage of life is characterized by two distinctive features, a mouth which is open upwards and attachment to a substrate or a surface. The medusa stage features the bell shaped body of the jellyfish, with the mouth opening downwards. In this stage, they are no longer attached to the substrate and are free swimming. However, in some Aurelia aurita, species the polyp stage does not exist.
Moon jellyfish depend on ocean currents for locomotion: Moon jellyfish in their larval stages make use of cilia for locomotion. The polyps use their gastrovascular cavity as a hydrostatic skeleton and also use few muscle like cells for contraction and extension movements. They creep along the substrate by using the muscle cells. The medusa move differently and use muscle cells called coronal muscle, present in the bell shaped upper body. This coronal muscle enables the animal to pulsate by its contraction movements, thereby causing it to move. These impulses sent to the coronal muscles are nervous in origin and are from the sub-umbrellar nerve net.
When the muscle cells contract in a rhythmic fashion, movement by jet propulsion occurs. The jellyfish controls these propulsions with the help of rhopalial centers. This swimming function is carried out, not to move from one place to another, but to keep themselves near the surface of the water. They swim horizontally in such a manner, so that at all times the bell shaped upper part remains near the surface of the water, thereby allowing them to spread their tentacles over a large area to catch maximum prey. Moon jellyfish are carried from place to place solely by the movement of ocean currents.
Moon jellyfish possess sting cells: The net of tentacles present in the lower part of the body of jellyfish are studded with scores of poisonous sting cells called cnidocytes or nematocysts, which are capable of injecting poison. The moment the tentacles brush against a prey, the numerous sting cells explode, thereby launching barbed stingers and poison into the prey's body. These sting cells are their defense mechanism and help in protecting themselves from predators. Nematocysts also play an important role in food capture.
Moon jellyfish are carnivorous: These invertebrates feed on zooplankton and are carnivorous. They feed primarily on mollusks, rotifers, nematods, diatoms, fish larvae, tunicate larvae, crustaceans, protozoans and several other small planktons. When the tentacles brush against the prey, their sting cells render the prey inactive. The inactive prey is then collected primarily on the surface of the jellyfish where they get entangled in the mucus. Further, by flagellar action, the food is passed through the mouth, along the eight canals inside the jellyfish body. These canals run into the stomach and bring the food to the stomach via the ring canal, where it is broken down by digestive enzymes.
Gonads are a distinctive feature of Moon jellyfish: Moon jellyfish contain 4 gonads that are situated at the bottom of the stomach. Moon jellyfish attain sexual maturity mostly in spring and summer and reproduction in them is sexual (distinct male and females). These gonads are characterized by bright coloration which can be clearly seen through the transparent bell body. When a Moon jellyfish is observed from above, the gonads appear like 4 horse shoe shaped parts, thereby becoming a distinguishing feature of these animals. These animals when observed during the months of August or September, show distinct pink arms, due to myriads of larvae developing at the edge of the bell shaped upper body.
Moon jellyfish are commonly observed to be washed out on the shores of the Long Beach Island beaches during the summer high tides and winds. By the time they get washed by the currents and land on the beach, their tentacles are ruptured and worn out. The bell portion of the Moon jellyfish cannot sting, and if at all you get stung by the tentacles, there is no need to worry as most of them are harmless (only some are poisonous). The stung area will hurt, but application of some household vinegar or urine has proven to be quite effective in treating the sting.
How many tentacles are on a box jellyfish?
A box jellyfish has 15 tentacles on each of its sides and it has 3 sides.
Which animals are concidered to be members of the phylum cnidaria?
There are a couple of classes in the phylum Cnidaria : Schyphozoa, Cubuzoa, Anthozoa, Hydrazoa. Scyphozoa consists of the true jellyfish. Cubozoa are jellyfish with a cube/box shaped medusae stage. The main genus that make up the class Cubuzoa is the Box Jellyfish : A jellyfish with the deadliest venom in the animal kingdom. Hydrazoa's are smell marine animals including the Hydra, and the Porteguse Man of War. Anthozoa includes Sea Anomenes and Corals. These organisms are generally in the polyp stage throughout their life.
Do jellyfish live in the ocean?
Most Jellyfish do but some do live in fresh water! There is a place on this island that has fresh water jellyfish you can swim with them my mom has!
Yes it can. It is one of the most painfull stings that you can get and leaves scratches in a pattern like nail scratches.
Generally speaking, the jellyfish's first line of defense are its stinging cells. In particular, when attacked or otherwise distressed, some species of jellyfish will detach their tentacles, and, if the jellyfish are deep-sea or nocturnal, glow very brightly, thereby stunning its attacker.
How powerful is a jellyfish's sting?
It depends, poisonous: SERIOUS!!!
Nonpoisonous: O.K.
The Australian sea wasp is one of the most venomous jellyfish on the planet and has killed hundreds of people on record: http://www.jellyfishart.com/kb_results.asp?ID=16
They are triploblastic because they are apart of the phyla Echinodermata. If you look at the animal phylogenetic tree you can see that starfish are apart of the triploblasts. The difference between diploblastic and triploblastic is that diploblastic have two germ layers during development which are the ectoderm and endoderm. Triploblastic animals (like starfish, and humans) have three germ layers which are the ectoderm (outside), mesoderm (middle) and endoderm (inside).
How are jellyfish harmful to humans?
yes, they do by making the water poputed which kills the box-jellyfishes habitat, harming the box-jellyfish. Also, by making a lot of its food endangered starves the box-jellyfish. Another way that humans harm box-jelly-fish is by taking away its habitat giving the jellyfish less room to live; killing it.
What are the names of all the jellyfish in the ocean?
There are over 200 species of Scyphozoa, about 50 species of Staurozoa, about 20 species of Cubozoa, and in Hydrozoa there are about 1000-1500 species that produce medusae (and many more hydrozoa species that do not). Way too many to list here.
Jellyfish live in packs, but some jellyfish travel by themselves.
How are baby jellyfish different from older jellyfish?
Baby jellyfish which are also known as planulas are smaller than the adults ones. You can have a look at the life cycle of jellyfish if you need any more information.
Do worms and jellyfish have neurons?
Yes jelly fish have neurons. The neuron is the brain of the jelly fish
