october2023: ATOLLA JELLYFISH

Atolla jellyfish is definitely one shifty species. When it feels tretened it gives of flashes of bluish luminescence. This creates the illusion of multiple jellyfish, making its predators confused. And also attracts even bigger predators that can chase of its original pursuers, while the atolla jelly can quietly step down from the scene. This strategy earned this species the nickname: "alarm jelly".

december2023: IMMORTAL JELLYFISH

This is probably the most op type jellyfish ever. In case of physical injuries or starvation instead of dying it take a leap back in it's development stage and turns back it's into polyp form. As polyps they form huge colonies and ride on the ballasts of ships. They aren't just immortal but also excellent hitchhikers.

november2023: MOON-JELLYFISH

Moon jellies along with several other types of jellyfish are the prey of lots of predators. They have little nutritinal value so the carnivores must eat hundreds of them every day. The problem is that jellyfish can be easily mistaken for the loads of trash floating aruond in the oceans. That's why turtles or other sea creatures hunting for jellyfish might end up suffocating because of a plastic bag wrapped around their head.

january2024: BOX JELLYFISH

In jellyfish terms box jellies are very advanced. They can swim, unlike most of their relatives, who can only drift with a current. They also have 24 eyes, that are located on the 4 sides of their bell. But since they lack a nervous system, scientist don't know how can they proccess, what they see. Not to mention they have one of the deadliest venom in the world.

february2024: CROWN JELLYFISH

The crown jellyfish (also known as the cauliflower jellyfish) is a collective noun for 6 different jellyfish families. There is a lot that is yet to be discovered about this jellyfish. Other than the fact that it's edible and totally harmless to humans there isn't much information about it.

may2024: PACIFIC SEA NETTLE

The pacific sea nettle's latin name is Chrysaora which is a reference for a greek mythological figure, Chrysaor, the son of Poseidon and Medusa and the brother of Pegasus. He was born when Perseus decapitated Medusa. Chrysaor's name translates to "he who has a golden sword", the name probably refers to the jellyfish's painful sting.

april2024: COMB JELLYFISH

Unlike other types of jellyfish this species doesn't use stingers. Instead they have a big "mouth" that can open very wide and basically suck in the prey, which can be almost the same size as the jellyfish itself. They also have a tendency to eat their own conspecifics.
It's improtant to note that this is NOT an actual jellyfish, only a close relative, however they are still very cool and deserve a place here.

june2024: BLUE BLUBBER JELLYFISH

Despite its name the blue blubber jellyfish vary in color based on which part of the world it is from. The blue blubber have eight tentacles, with small "mouth-like" openings on each of them, these openings work to capture the prey and transport it to the jelly's stomach.

july2024: LION'S MANE JELLYFISH

The lion's mane jellyfish is known for being the largest type of jellyfish. the biggest recorded specimen's bell's size was 210 centimetres (7 feet) and it's tentacles were 36.6 m (120 ft) long (according to wikipedia.org). The jellyfish probably got it's name after their long poisounos mane-like tentacles, which they capture their prey with.

september2024: PHANTOM JELLYFISH

Phantom jellyfish is like a vast misterious lady, floating through the midnight zone elegantly. Scientists know very little about these creatures, since throughout history they've only shown themselves to humans a very few times. For now phantom jellyfish are known for their extraordinarily huge size. to its large bell, that can reach more than 1 meter in size is connected 4 extremelly long arms, each of them resembling a long grey curtain.

august2024: FLAME JELLYFISH

This is one of the subspecies of jellyfish that is safe for humans to eat. In South-Asia edible jellyfish is considered a delicacy.
Flame jellyfish prefer warm waters with lower salinity, so in China people even started breeding them in ponds.
They are named after their red arms, which apparently reminded scientists of flames.

october2024: DINNER PLATE JELLYFISH

Dinner plate jellyfish are unique because while most jellyfish usually just nonchalantly float around in the ocean waiting for their meals to pass by them, these sea-jellies are actually actively hunting for something they can put on their dinner-plates. (haha funny joke, be amazed by immaculate sense of humor)

november2024: ACROMITUS MACULOSUS

An obscure and mysterious species, not much has been discovered about them yet, but they still look very cool and deserve their place here

january2025: PSYCHEDELIC JELLYFISH

Unlike most other jellyfish with these gnarly little creatures, you can easily distinguish the males from the females. Females carry their round mold-looking baby medusae under their belts, until they come of age and are ready to live the 'family nest'. Meanwhile the males instead of their descendants, keep their colorful sausage-shaped gonads under their belt.

december2024: THIMBLE JELLYFISH

Thimble jellyfish are cool jello-looking creatures. their larvae is one of the main cause of a condition called the "seabather's eruption" which happens when someone swims through a cloud of mischievous jellyfish larvae, which gets stuck on the human. once the tiny jellyfish larvaes are washed off (and with this killed) they sting the seabather.

february2025: CANNONBALL JELLYFISH

Unlike most types of jellyfish, whom usually let the current carry them wherever it wants to, the cannonball jellyfish uses it's oral arms to navigate themselves through the oceans.
they are also often referred to as cabbagehead jellyfish. and since we are already on the topic of food, cannonball jellyfish - beside their usual marine predators - also often fall prey to fishermen, because they are suitable for human consumption.

march2025: COMPASS JELLYFISH

The coastal waters of the northeastern Atlantic are rife with a glistering blob with a symmetrical pattern on its bells, and this notorious lurker of the sea is none other than the compass jellyfish. There is a parasite that often likes to choose this type of jellyfish as their host, but even this couldn’t really reduce the overpopulation of the species, which is caused by global warming.

may2025: SEA GOOSEBERRY

the sea gooseberry is a genus of comb jelly. it uses the colloblasts found on its tentacles to release an adhesive substance to trap its prey.
along the colloblasts, sea gooseberry’s tentacles are covered in a multitude of little plates called cilia, the simultaneous beating of these cilia is what allows the sea gooseberry to navigate in the ocean.

april2025: BLUE(FIRE) JELLYFISH

blue(fire) jellyfish look a lot like a tiny version of a lion’s mane jellyfish. blue jellies are very pale in the beginning of their lives but as they age their bell will be tinted in a bright blue/purple, sometimes even a yellow color.

june2025: CLINGING JELLYFISH

clinging jellyfish are small little creatures, not counting the tentacles, they only grow 1-3 cm in diameter. clinging jellyfish have sticky patches in their tentacles with which they can attach themselves to seaweeds or any other surface, hence their name.

july2025: BURGESSOMEDUSA PHASMIFORMIS

burgessomedusa is the oldest jellyfish fossil found. this cnidarian was habiting the oceans more than 500 million years ago. the name phasmiformis stems from the species' ghostlike shape, but it has also been stated that its in reference to the pac-man ghosts too.

september2025: BARREL JELLYFISH

barrel jellyfish aka dustbin-lid jellyfish aka frilly-mouthed jellyfish has the greatest and funniest collection of names(legit info, fact-checked by totally real marine scientists). it is also a quite fairly sizeable jellyfish, not as big as the lion’s mane, but its still worth the praise and the mentioning.
human usage of the barrel jelly includes utilizing it as a food and medicine component.
leatherback turtle usage of the barrel jelly includes utilizing it as a food component too, as it is their favorite.

august2025: RED PAPER LANTERN JELLYFISH

red paper lantern jellyfish got its name after its bell which crinkles and stretches out as the jelly "swims" through the ocean resembling a real paper lantern. it is an arguably beautiful and impressive sea creature. evidently many small ocean critters think so too, because they often choose this hydrozoan as their home.

october2025: COPULA SIVICKISI

this is a very small nocturnal genus of box jelly. During the day the copula sivickisi attaches itself to a sympathetic coral or stone with the adhesive pads on its bell. It lays low and completely flat (with the tentacles folded under its belt) until the sun goes down, when the copula sivickisi comes out of its daytime resort to feed. this jelly’s hunting strategy consists of it rising to the surface then starting to sink with the tentacles extended like a fishing net.
Unlike most jellyfish the copula sivickisi has an actual mating ritual.

november2025: EGG YOLK JELLYFISH

not to be confused w/ the fried egg jellyfish. there is a great number of disoriented cracked eggs found all around the world’s oceans. they are mostly found passively drifting along the currents waiting for their prey to swim into their dense ray of tentacles. However not every sea creature falls victim to the egg yolk jelly’s stinging cells, small fish, crabs and amphipods are often found hitchhiking on top or under the jelly’s bell.

january2026: VENUS' GIRDLE

this bioluminescent seabacon is a type of comb jelly, which can grow 1 meter long and 5 cm wide. the venus’ girdle swims in an undulating motion for which it uses a row of combs located on one side of its ribbon-shaped body. on its other side you can find the silly rainbow beast’s mouth.

december2025: BROWN-BANDED MOON JELLY

brown-banded moon jelly just like its name suggests is type of moon jelly, which is the most common genus of jellyfish around the world. they can be distinguished from their cousins by the brown band around their mesoglea.

february2026: PELAGIA NOCTILUCA

pelagia noctiluca goes by many names, such as mauve stinger, purple-striped jelly, purple people eater etc. among the wide collection of names the most accurate is the ”night-light jellyfish”, as that is what its latin title translates to. the jellyfish has earned this name thanks to their ability to emit bioluminescence when they are

stimulated by waves or turbulence; despite being a cnidarian, pelagia noctilucas dont have a polyp stage, they reproduce sexually only.
the mauve stinger has a painful but remotely dangerous sting to humans, however they have been recorded to wipe out whole fish farms. thanks to this violent behaviour they are very popular among marine biologists.

march2026: IRUKANDJI JELLYFISH

irukandji jellyfish is a very small, very venomous box jellyfish. for a long time it was believed the carukia barnesi is the only irukandji jellyfish, but later it turned out, they actually have many other close relatives. unlike most jellyfish, the irukandji doesn’t only have stinging cells on their 4 tentacles, but also all over their

bells, this combined with their tiny size and see-through mesoglea makes them particularly hard to spot and also very dangerous.

the aforementioned irukandji syndrome is created by the jelly’s venom; the sting at first is only moderately irritating, the actual symptoms of the condition only begin to show 5-120 minutes after the sting. the syndrome can cause muscle cramps, abdominal and back pain, nausea, anxiety, vomiting, etc; the syndrome in severe cases can cause heart failure or cerebral hemorrhage; but most often the victims can survive the sting after getting treated in a hospital.