Medusa, in zoology, one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria. It is the typical form of the jellyfish. The medusoid body is bell- or umbrella-shaped. … The other principal body type of the adult cnidarian is the polyp, a stalked, sessile (attached) form.
Are jellyfish named after medusa?
Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria.
What is difference between jellyfish and medusa?
As nouns the difference between medusa and jellyfish
is that medusa is (zoology) special form that cnidarians may turn into while jellyfish is (zoology) almost transparent aquatic being; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Are jellyfish immortal?
The ‘immortal’ jellyfish, Turritopsis dohrnii
To date, there’s only one species that has been called ‘biologically immortal’: the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Did Medusa live in the sea?
It is generally believed that she was born at sea. The Greek poet Hesiod wrote that Medusa lived close to the Hesperides in the Western Ocean near Sarpedon.
Do jellyfish lay eggs?
Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually. Learn more about the lifecycle and reproduction of jellyfish.
What is a group of jellyfish called?
A group of jellyfish is called a SMACK!
Does a jellyfish have eyes?
The jellyfish has six eye clusters. Each contains four very simple eyes consisting of pigment-filled pits to catch light, and a pair of more complex, lensed eyes. At just a tenth of a millimetre across, the lenses are made of material that has variable optical properties.
Do corals have medusa?
Corals, sea anemones and jellyfish belong to a group of animals called cnidarians. They have a simple body consisting of a central gut cavity surrounded by tentacles. … There are two basic cnidarian body shapes: a polyp form, which is attached to a surface; and an upside-down free-floating form called a medusa.
Is medusa a goddess?
Most recognizable for her locks of snakes, Medusa was the daughter of ancient chthonic deities of the sea. She was born far across the ocean from Greece; Later contributing authors to Medusa’s myth placed her homeland as Libya.
How did medusa become evil?
The snake-haired Medusa does not become widespread until the first century B.C. The Roman author Ovid describes the mortal Medusa as a beautiful maiden seduced by Poseidon in a temple of Athena. Such a sacrilege attracted the goddess’ wrath, and she punished Medusa by turning her hair to snakes.
Are jellyfish smart?
Though jellyfish do not have a brain, they are incredibly smart and adaptable. For more than 500 million years, they’ve been bobbing around almost all the world’s oceans, both close to the water surface as well as in depths of up 700 meters.
What is the biggest jellyfish in the world?
Growing up to 120 feet long with bells up to 8 feet wide, the lion’s mane jelly is the largest known jelly species out there. They can have up to 1,200 tentacles, which originate from under the bell in 8 distinct clusters of 70 and 150 tentacles each. These tentacles contain large amounts of neurotoxins.
Do jellyfish have brains or hearts?
Lacking brains, blood, or even hearts, jellyfish are pretty simple critters. They are composed of three layers: an outer layer, called the epidermis; a middle layer made of a thick, elastic, jelly-like substance called mesoglea; and an inner layer, called the gastrodermis.
What do you call a bunch of monkeys?
A troop or barrel of monkeys.
What is a group of children called?
A group of children = crowd.
What is a group of giraffes called?
A group of giraffes is called a tower. These amazing animals can be found in the African plains, and they use their long necks to reach leaves on the tops of trees. It’s their long necks which helped give them their group name, as they are so tall they tower over bushes and other animals!
Do jellyfish have poop?
The first animals that arose seem to have literally had potty mouths: Their modern-day descendants, such as sea sponges, sea anemones, and jellyfish, all lack an anus and must eat and excrete through the same hole.
Do jellyfish get pregnant?
Jellyfish reproduction involves several different stages. In the adult, or medusa, stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula. … The jellyfish sting actually comes from tiny nematocysts, or stinging cells, on the jellyfish body.
What is the lifespan of a jellyfish?
Most jellyfish are short lived. Medusa or adult jellyfish typically live for a few months, depending on the species, although some species can live for 2-3 years in captivity. Polyps can live and reproduce asexually for several years, or even decades. One jellyfish species is almost immortal.
Who was the ugliest god?
Facts about Hephaestus
Hephaestus was the only ugly god among perfectly beautiful immortals. Hephaestus was born deformed and was cast out of heaven by one or both of his parents when they noticed that he was imperfect. He was the workman of the immortals: he made their dwellings, furnishings, and weapons.
Why did Athena punish Medusa?
Medusa. The Medusa we know was raped by Poseidon in the goddess Athena’s temple. Athena then punished her for desecrating her sacred space by cursing Medusa with a head full of snakes and a gaze that turns men to stone. Then, a heroic Perseus severed the serpent-headed Medusa, turning her into a trophy.