Yes, there are "friendly" jellyfish like the Moon Jellyfish (Aurelia aurita), which are translucent, graceful, and have stings too weak to harm most humans, making them safe to observe and even keep as pets. Other non-stinging or mild-stinging varieties, such as some comb jellies (sea gooseberries) or cannonball jellyfish, also exist, offering gentle interactions in the ocean.
Moon jellyfish can be touched, as their stinging cells are typically too weak to harm humans.
MYTH #2: Jellyfish "go after" people
Not true. Any contact with jellyfish is incidental. Humans are not on their menu, but when we are in their environment we can get in the way of their tentacles.
Yes -- certain species of jellyfish can be kept as pets, but doing so requires specialized equipment, knowledge, and ongoing care. Jellyfish are not a typical beginner's pet; they have delicate physiology, unique husbandry needs, and ethical considerations.
This colorful jelly has a very toxic sting, but reports of human fatalities are few. It's considered a giant jelly — its bell can reach about three feet (1 m) in diameter and its tentacles can grow to more than 100 feet (30.5 m) long.
They don't have a brain like we do – just a network of nerves with sensory receptors that detect changes to their environment. So, when a jellyfish moves or reacts, it's largely driven by automatic reflexes, not the kind of conscious decision-making we associate with sentience.
Theoretically, this process can go on indefinitely, effectively rendering the jellyfish biologically immortal, although in practice individuals can still die. In nature, most Turritopsis dohrnii are likely to succumb to predation or disease in the medusa stage without reverting to the polyp form.
Jellyfish can't feel pain.
It's amazing, no worries of life and just spending their short span on this planet, just to feel the velvet of water on their pretty jelly-like body.
#1 Moon Jellies
They are hardy, don't require much space and don't even sting. While moon jellies are very hardy and easy to keep, most strains need to be kept at 23c (73f) at most so if your room temperature is higher than that then you might have to look into some cooling solutions.
Moon Jelly Touch Tank
Their sting is not strong enough to penetrate human skin, so they are safe to touch.
This is because jellyfish are about 95 percent water. Lacking brains, blood, or even hearts, jellyfish are pretty simple critters.
The Chinese have been eating jellyfish for more than a thousand years and consider it a ceremonial delicacy. Traditional Chinese weddings and banquets usually include a jellyfish salad and other dishes featuring jellyfish.
Jellyfish have existed for over 650 million years, making them one of the oldest living creatures on Earth. They are indeed fascinating because they lack a brain, heart, and blood. Instead of a brain, jellyfish have a simple nerve net that helps them sense their environment and respond to it.
Halitrephes maasi is the scientific name of the firework jellyfish. They are among the rarest and prettiest species. They have very thin tentacles that reflect light, which appear like a firework. Moreover, these tentacles are frilled and appear like stars around the moon.
The simplest swimming animals on Earth, jellyfish lack bones, blood, a heart, and even a brain.
Operant conditioning — learning to do something for a desired outcome — has never been convincingly demonstrated in Cnidaria. A study now shows that box jellyfish, Tripedalia cystophora, can learn to avoid bumping into an obstacle based on visual cues.
1″ (small) $25.00 each, 2″ (medium) $35.00 each, 3″ (large) $50.00 each.
The hydrozoan Turritopsis dohrnii, an animal about 4.5 millimetres wide and tall (likely making it smaller than the nail on your little finger), can actually reverse its life cycle. It has been dubbed the immortal jellyfish.
Jellyfish can clone themselves
Yep, that's right – if a jellyfish is sliced in half, the two pieces can regenerate and create two new organisms.
Look but don't touch - they give a very nasty sting, even long after they are dead. The Wildlife Trusts are working with sea users, scientists, politicians and local people towards a vision of 'Living Seas', where marine wildlife thrives.
When it comes to learned behavior, even the simplest minds are capable of advanced thought. The Caribbean box jellyfish (Tripedalia cystophora), which doesn't even have a brain, can alter its behavior based on past experiences, new research reveals.
The tubeworm Escarpia laminata that lives in deep sea cold seeps regularly reaches the age of between 100 and 200 years, with some individuals determined to be more than 300 years old. Some may live for over 1,000 years.
By preying on fish which have an abundant population, jellyfish help to control fish stocks. Controlling these fish populations frees up some of the ocean's resources, which can be used by less well-established fish species. This allows these fish species to grow and thrive, helping to enhance ocean biodiversity.
505-million-year-old swimming jellyfish from the Burgess Shale highlights diversity in Cambrian ecosystem. TORONTO, August 2, 2023 – Royal Ontario Museum (ROM) announces the oldest swimming jellyfish in the fossil record with the newly named Burgessomedusa phasmiformis.