Jellyfish | Medusozoa

Jellyfish, also sometimes referred to as Sea Jellies, is the marine animal that is part of the Medusozoa subphylum and is known for its unusual body form. The Jellyfish has an umbrella-like gelatinous body with trailing tentacles that are used both to capture prey and defend itself. A Jellyfish swims by pulsating the top part of its body to propel itself through the water. The Jellyfish can be found all over the world and lives in both surface or deep waters. The lifespan of a Jellyfish depends on the species, but some have a lifespan of 12 to 18 months while others can live up to 20 years.

What is a group of jellyfish called?

A group of jellyfish is called a smack. A smack is also the term used to describe a slap or blow that is given by the hand either usually as a reaction. The term smack is used for a group of jellyfish as it describes what it feels like when someone is among jellyfish.

What do jellyfish eat?

Jellyfish usually eat whatever food they find as they swim through water and can fit in their mouth which includes shrimp, krill, and small fish. As a result of this process, jellyfish are considered ‘passive’ feeders since they are not actively hunting or looking for food.

How do jellyfish reproduce?

Jellyfish reproduce in 2 different ways depending on their current body form since they embody 2 different body forms throughout their lifespan, the medusa and polyps. Polyps can reproduce through asexual budding and the medusa body form reproduces through spawn eggs and sperm to reproduce sexually.

Jellyfish Guides
Browse through our curated Jellyfish Guides for additional categorizations, tips, details, variations, styles, and histories of Jellyfish. Guides provide additional insights into the unique properties and shared relationships between elements.
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2.36”-4.33” | 6-11 cm
5”-9.84” | 12.7-25 cm
17.7”-35” | 45-89 cm
6-18 months
Atlantic Sea Nettle
11.000
25.000
89.000
1.50
300
3D
Atlantic Sea Nettle
.79”-6.7” | 2-17 cm
.79”-6.7” | 2-17 cm
1.6”-13.8” | 4-35 cm
Atolla Jellyfish
17.000
17.000
35.000
1200
3D
Atolla Jellyfish
12.6”-47” | 32-119 cm
15.75”-59” | 40-150 cm
29”-108” | 74-274 cm
55-88 lb | 25-40 kg
2-6 months
Barrel Jellyfish
119.000
150.000
274.000
40.000
0.50
6400
3D
Barrel Jellyfish
8.3”-18.9” | 21-48 cm
16”-36” | 40.6-91.4 cm
44”-104” | 112-264 cm
6-12 months
Black Sea Nettle Jellyfish
48.000
91.400
264.000
1.00
350
3D
Black Sea Nettle Jellyfish
.59”-6.3” | 1.5-16 cm
.47”-3.94” | 1.2-10 cm
.59”-6.3” | 1.5-16 cm
Bloodybelly Comb Jellyfish
16.000
10.000
16.000
100
3D
Bloodybelly Comb Jellyfish
7.1”-13.8” | 18-35 cm
9.84”-17.72” | 25-45 cm
24.8”-44.9” | 63-114 cm
1 year
Blue Jellyfish
35.000
45.000
114.000
1.00
5800
3D
Blue Jellyfish
5.5”-7.9” | 14-20 cm
7.1”-9.84” | 18-25 cm
7.5”-10.6” | 19-27 cm
.31-3 lb | .14-1.38 kg
3-6 months
Cannonball Jellyfish
20.000
25.000
27.000
1.380
0.50
12000
3D
Cannonball Jellyfish
3.5”-6.3” | 9-16 cm
5.9”-10” | 15-25.4 cm
16.5”-27.2” | 42-69 cm
.44-5.3 lb | .2-2.4 kg
1 year
Compass Jellyfish
16.000
25.400
69.000
2.400
1.00
5600
3D
Compass Jellyfish
8.7”-19.7” | 22-50 cm
9.84”-23.62” | 25-60 cm
13”-30.7” | 33-78 cm
.04-.89 lb | .02-.4 kg
3-6 months
Crowned Jellyfish
50.000
60.000
78.000
0.400
0.50
5
3D
Crowned Jellyfish
.5”-5.9” | 1.2-15 cm
.8”-10” | 2-25.4 cm
1.2”-14.2” | 3-36 cm
2-6 months
Crystal Jellyfish
15.000
25.400
36.000
0.50
1500
3D
Crystal Jellyfish
.3”-.63” | .8-1.6 cm
.39”-.79” | 1-2 cm
.67”-1.34” | 1.7-3.4 cm
Darth Vader Jellyfish
1.600
2.000
3.400
40
3D
Darth Vader Jellyfish
4.7”-5.9” | 12-15 cm
4.72”-5.91” | 12-15 cm
8.3”-10.6” | 21-27 cm
4-6 months
Flower Hat Jelly
15.000
15.000
27.000
0.50
150
3D
Flower Hat Jelly
1.6”-8.7” | 4-22 cm
2.36”-11.8” | 6-30 cm
2”-10.2” | 5-26 cm
4-6 months
Fried Egg Jellyfish
22.000
30.000
26.000
0.50
2000
3D
Fried Egg Jellyfish
10.2”-41.3” | 26-105 cm
15.75”-78.75” | 40-200 cm
28.3”-143” | 72-362 cm
200-480 lb | 91-217 kg
1 year
Lion’s Mane Jellyfish
105.000
200.000
362.000
217.000
1.00
6900
3D
Lion’s Mane Jellyfish
.79”-2.75” | 2-7 cm
1.18”-3.94” | 3-10 cm
3.15”-11” | 8-28 cm
6-9 months
Mauve Stinger
7.000
10.000
28.000
0.75
2300
3D
Mauve Stinger
3.94”-9.1” | 10-23 cm
5.91”-13.78” | 15-35 cm
7.1”-16.5” | 18-42 cm
.01-.07 lb | .01-.03 kg
8-12 months
Moon Jellyfish
23.000
35.000
42.000
0.030
1.00
56000
3D
Moon Jellyfish
22”-27.2” | 56-69 cm
30”-36” | 76.2-91.4 cm
55”-67” | 140-170 cm
30-50 lb | 14-23 kg
Pink Meanie Jellyfish
69.000
91.400
170.000
23.000
1200
3D
Pink Meanie Jellyfish
2”-5.1” | 5-13 cm
4.72”-11.8” | 12-30 cm
8.7”-23.2” | 22-59 cm
1 year
Portuguese Man o' War
13.000
30.000
59.000
1.00
17000
3D
Portuguese Man o' War
3.5”-5.1” | 9-13 cm
2.95”-3.94” | 7.5-10 cm
6.7”-9.1” | 17-23 cm
Red Paper Lantern Jellyfish
13.000
10.000
23.000
5
3D
Red Paper Lantern Jellyfish
13.4”-14.2” | 34-36 cm
17.7”-19.7” | 45-50 cm
36.2”-41.7” | 92-106 cm
20-24 lb | 9-11 kg
1 year
White-Spotted Jellyfish
36.000
50.000
106.000
11.000
1.00
410
3D
White-Spotted Jellyfish
Atolla Jellyfish (Atolla wyvillei)
Dimensioned comparison drawing of the Atolla Jellyfish compared to other jellyfish and a person

The Atolla jellyfish, also known as Atolla wyvelli, is a deep-sea bioluminescent jellyfish. The Atolla jellyfish is a crown jellyfish and has about 20 tentacles of all equal length and then one longer tentacle it uses to capture prey. The Atolla jellyfish is named after Sir Charles Wyville Thomson, the lead scientist on the Challenger expedition. The Atolla jellyfish is also called the “alarm jellyfish” as it flashes its bioluminescent red when it is under attack in order to draw bigger predators to attack the creature it is under attack from. This “alarm” action has been mimicked by scientists in order to attract other deep sea creatures so they could be observed, such as the giant squid.

Atolla Jellyfish have a bell width between .79”-6.7” (2-17 cm), bell height of .79”-6.7” (2-17 cm), and overall length of 1.6”-13.8” (4-35 cm).

Set of scaled elevation drawings of the Atolla Jellyfish viewed from the front and side
The Atolla jellyfish, also known as Atolla wyvelli, is a deep-sea bioluminescent jellyfish. The Atolla jellyfish is a crown jellyfish and has about 20 tentacles of all equal length and then one longer tentacle it uses to capture prey. The Atolla jellyfish is named after Sir Charles Wyville Thomson.

Atolla Jellyfish have a bell width between .79”-6.7” (2-17 cm), bell height of .79”-6.7” (2-17 cm), and overall length of 1.6”-13.8” (4-35 cm).

Set of scaled elevation drawings of the Atolla Jellyfish viewed from the front and side
Atolla Jellyfish (Atolla wyvillei)
Height:
.79”-6.7” | 2-17 cm
Width:
.79”-6.7” | 2-17 cm
Length:
1.6”-13.8” | 4-35 cm
Depth:
Weight:
Area:
Scientific Name
Atolla wyvillei
Lifespan

Drawings include:

Atolla Jellyfish side elevation, front, top

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Darth Vader Jellyfish (Bathykorus bouilloni)
Dimensioned comparison drawing of the Darth Vader Jellyfish compared to other jellyfish

The Darth Vader jellyfish, known scientifically as Bathykorus bouilloni, despite being affectionately nicknamed Darth Vader jellyfish, is actually a hydrozoan found in the deep sea in the Arctic. The Darth Vader jellyfish is a very small, transparent light blue organism that lives at depths more than 3,300 feet below sea level. The Darth Vader jellyfish has a helmet shaped cap, thus giving it its moniker, with four long tentacles protruding from the top of the cap and four, short, secondary tentacles extending from the bottom. Due to the depths at which this creature lives, the Darth Vader jellyfish has yet to be observed with the human eye and is monitored only by remote operated vehicles.

Darth Vader Jellyfish have a bell width between .39”-.79” (1-2 cm), bell height of .3”-.63” (.8-1.6 cm), and overall length of .67”-1.34” (1.7-3.4 cm).

Set of scaled elevation drawings of the Darth Vader Jellyfish viewed from the front and side
The Darth Vader jellyfish, known scientifically as Bathykorus bouilloni, despite being affectionately nicknamed Darth Vader jellyfish, is actually a hydrozoan found in the deep sea in the Arctic. The Darth Vader jellyfish is a very small, transparent light blue organism with a helmet shape.

Darth Vader Jellyfish have a bell width between .39”-.79” (1-2 cm), bell height of .3”-.63” (.8-1.6 cm), and overall length of .67”-1.34” (1.7-3.4 cm).

Set of scaled elevation drawings of the Darth Vader Jellyfish viewed from the front and side
Darth Vader Jellyfish (Bathykorus bouilloni)
Height:
.3”-.63” | .8-1.6 cm
Width:
.39”-.79” | 1-2 cm
Length:
.67”-1.34” | 1.7-3.4 cm
Depth:
Weight:
Area:
Scientific Name
Bathykorus bouilloni
Lifespan

Drawings include:

Darth Vader Jellyfish side elevation, front, top

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Crystal Jellyfish (Aequorea victoria)
Measured comparison illustration of the size of a Crystal Jellyfish to other jellyfish

The Crystal jellyfish, also known as Aequorea victoria, is a nearly completely see-through jellyfish with delicate strands as tentacles. The Crystal jellyfish is found in the Pacific ocean in the range from southern California all the way to Vancouver. The Crystal jellyfish is capable of expanding its mouth to eat other jellies more than half its size. The Crystal jellyfish lightly glows due to light-producing organs along the edge of its cap. In fact, the Crystal jellyfish is frequently harvested to be used as biological marker for calcium thanks to its glowing organs.

Crystal Jellyfish have a bell width between .8”-10” (2-25.4 cm), bell height of .5”-5.9” (1.2-15 cm), and overall length of 1.2”-14.2” (3-36 cm). The typical lifespan of the Crystal Jellyfish is 2-6 months.

Scaled collection of drawings of Crystal Jellyfish in front and side poses
The Crystal jellyfish, also known as Aequorea victoria, is a nearly completely see-through jellyfish with delicate strands as tentacles. The Crystal jellyfish is found in the Pacific ocean in the range from southern California all the way to Vancouver.

Crystal Jellyfish have a bell width between .8”-10” (2-25.4 cm), bell height of .5”-5.9” (1.2-15 cm), and overall length of 1.2”-14.2” (3-36 cm). The typical lifespan of the Crystal Jellyfish is 2-6 months.

Scaled collection of drawings of Crystal Jellyfish in front and side poses
Crystal Jellyfish (Aequorea victoria)
Height:
.5”-5.9” | 1.2-15 cm
Width:
.8”-10” | 2-25.4 cm
Length:
1.2”-14.2” | 3-36 cm
Depth:
Weight:
Area:
Scientific Name
Aequorea victoria
Lifespan
2-6 months

Drawings include:

Crystal Jellyfish side elevation, front, top

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Barrel Jellyfish (Rhizostoma pulmo)
Scale illustration of an average Barrel Jellyfish with dimensions length compared to a human and jellyfish

The Barrel jellyfish, known as Rhizostoma pulmo, is a giant jellyfish with a large yellow bell and eight frilly tentacles. The Barrel jellyfish is commonly found off of the Southern and Western coasts of Britain during the summer when it washes up on the shore during its quest to feed on plankton and avoid being hunted by the leatherback turtle, its greatest predator. The Barrel jellyfish can sting, although not with an intensity enough to harm a human beyond a painful experience, so it is best to be avoided if seen on shore, especially as the tentacles can still sting after they are separated from the bell.

Barrel Jellyfish have a bell width between 15.75”-59” (40-150 cm), bell height of 12.6”-47” (32-119 cm), and overall length of 29”-108” (74-274 cm). The typical lifespan of the Barrel Jellyfish is 2-6 months with a weight between 55-88 lb (25-40 kg).

Pair of elevation illustrations of the Barrel Jellyfish seen from the side and front
The Barrel jellyfish, known as Rhizostoma pulmo, is a giant jellyfish with a large yellow bell and eight frilly tentacles. The Barrel jellyfish is commonly found off of the Southern and Western coasts of Britain during the summer when it washes up on the shore during its quest to feed on plankton.

Barrel Jellyfish have a bell width between 15.75”-59” (40-150 cm), bell height of 12.6”-47” (32-119 cm), and overall length of 29”-108” (74-274 cm). The typical lifespan of the Barrel Jellyfish is 2-6 months with a weight between 55-88 lb (25-40 kg).

Pair of elevation illustrations of the Barrel Jellyfish seen from the side and front
Barrel Jellyfish (Rhizostoma pulmo)
Height:
12.6”-47” | 32-119 cm
Width:
15.75”-59” | 40-150 cm
Length:
29”-108” | 74-274 cm
Depth:
Weight:
55-88 lb | 25-40 kg
Area:
Scientific Name
Rhizostoma pulmo
Lifespan
2-6 months

Drawings include:

Barrel Jellyfish side elevation, front, top

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Mauve Stinger (Pelagia noctiluca)
Dimensioned comparison drawing of the Mauve Stinger compared to other jellyfish

The Mauve Stinger jellyfish, known as Pelagia noctiluca, is a widely-studied, common, bioluminescent jellyfish that can be found worldwide in temperate and tropical waters. The Pelagia noctiluca is currently the only species in its genus, but there are similar, yet undefined, jellies that have been observed in Mediterranean and Gulf of Mexico. The Mauve Stinger is relatively small and can be variable in color, but the main distinction is that both the tentacles and the bell of this jellyfish are capable of stings. The stings of the Mauve Stinger, while painful, are not considered dangerous. However, when masses of Mauve Stingers wash upon shores they can affect tourism and fish economies due to their presence making the beaches inhabitable and gumming up fishing nets.

Mauve Stingers have a bell width between 1.18”-3.94” (3-10 cm), bell height of .79”-2.75” (2-7 cm), and overall length of 3.15”-11” (8-28 cm). The typical lifespan of the Mauve Stinger is 6-9 months.

Set of scaled elevation drawings of the Mauve Stinger viewed from the front and side
The Mauve Stinger jellyfish, known as Pelagia noctiluca, is a widely-studied, common, bioluminescent jellyfish that can be found worldwide in temperate and tropical waters. The Pelagia noctiluca is currently the only species in its genus, but there are similar, yet undefined, jellies.

Mauve Stingers have a bell width between 1.18”-3.94” (3-10 cm), bell height of .79”-2.75” (2-7 cm), and overall length of 3.15”-11” (8-28 cm). The typical lifespan of the Mauve Stinger is 6-9 months.

Set of scaled elevation drawings of the Mauve Stinger viewed from the front and side
Mauve Stinger (Pelagia noctiluca)
Height:
.79”-2.75” | 2-7 cm
Width:
1.18”-3.94” | 3-10 cm
Length:
3.15”-11” | 8-28 cm
Depth:
Weight:
Area:
Scientific Name
Pelagia noctiluca
Lifespan
6-9 months

Drawings include:

Mauve Stinger side elevation, front, top

Details & Downloads

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