Jellyfish | Medusozoa

Jellyfish | Medusozoa

Description
Description

Jellyfish, or Medusozoa, are gelatinous sea creatures known for their umbrella-shaped bells and trailing tentacles. These ancient animals have roamed the oceans for over 500 million years, predating even dinosaurs. Jellyfish inhabit every ocean, from surface waters to the deep sea, and some species even thrive in freshwater. They play a crucial role in marine ecosystems, both as predators and prey. Jellyfish have a simple body structure with no brain, heart, or bones, and they move by pulsating their bell-like bodies. Their evolution has equipped them with stinging cells, or nematocysts, used for defense and to capture prey, making them fascinating yet sometimes feared ocean dwellers.

Anatomy
Anatomy

Jellyfish are unique creatures with a simple, translucent body mainly made up of water. Their most recognizable part is the bell, a dome-shaped structure that pulsates to propel them through the water. From the underside of the bell hang tentacles armed with stinging cells called nematocysts, used for defense and catching prey. Jellyfish lack complex organs like brains or hearts; instead, they have a basic nerve net to detect changes in their environment. They don't have true speech, but they can sense light and certain chemicals. Despite their simple anatomy, jellyfish are efficient swimmers and survivors, having existed for millions of years.

Human Interaction
Human Interaction

The relationship between humans and jellyfish has been a mix of fascination and caution. Jellyfish have graced our oceans for over 500 million years, longer than most marine species. They often feature in literature and films as mysterious, ethereal beings, sometimes with a sting in the tale. While swimmers and beachgoers respect their painful sting, jellyfish have also inspired design, from fashion to architecture. In some cultures, they're a culinary delicacy.

Scientifically, their resilience and simple anatomy offer insights into evolution and biology. Conservation efforts focus on understanding their role in marine ecosystems, as their populations can explode, affecting fishing and tourism industries.

Common Questions
Common Questions
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.

Animals

* Under Development *

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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
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
GUIDE
3D
White-Spotted Jellyfish
Compass Jellyfish (Chrysaora hysoscella)
Scale illustration of an average Compass Jellyfish with dimensions length compared to a human and jellyfish

The Compass jellyfish, known scientifically as Chrysaora hysoscella, is a yellow-white jellyfish with brown markings on the top of its bell. These markings are v-shaped and radiant out from the center and resemble a compass, the Compass jellyfish’s namesake. Along the edge of the bell, the Compass jellyfish protrudes fringe with wavy oral arms and has tentacles hanging from the center of the bell. The Compass jelly has a powerful sting and should be avoided if recognized on the beach. The Compass jelly is common off the coast of Britain during the warmer summer months.

Compass Jellyfish have a bell width between 5.9”-10” (15-25.4 cm), bell height of 3.5”-6.3” (9-16 cm), and overall length of 16.5”-27.2” (42-69 cm). The typical lifespan of the Compass Jellyfish is 1 year with a weight between .44-5.3 lb (.2-2.4 kg).

Pair of elevation illustrations of the Compass Jellyfish seen from the side and front
The Compass jellyfish, known scientifically as Chrysaora hysoscella, is a yellow-white jellyfish with brown markings on the top of its bell. These markings are v-shaped and radiant out from the center and resemble a compass, the Compass jellyfish’s namesake.

Compass Jellyfish have a bell width between 5.9”-10” (15-25.4 cm), bell height of 3.5”-6.3” (9-16 cm), and overall length of 16.5”-27.2” (42-69 cm). The typical lifespan of the Compass Jellyfish is 1 year with a weight between .44-5.3 lb (.2-2.4 kg).

Pair of elevation illustrations of the Compass Jellyfish seen from the side and front
Compass Jellyfish (Chrysaora hysoscella)
Height:
3.5”-6.3” | 9-16 cm
Width:
5.9”-10” | 15-25.4 cm
Length:
16.5”-27.2” | 42-69 cm
Depth:
Weight:
.44-5.3 lb | .2-2.4 kg
Area:
Scientific Name
Chrysaora hysoscella
Lifespan
1 year

Drawings include:

Compass Jellyfish side elevation, front, top

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Crowned Jellyfish (Cephea cephea)
Measured comparison illustration of the size of a Crowned Jellyfish to a typical person and jellyfish

The Crowned jellyfish, known as Cephea cephea, is a crown jellyfish usually found in the cold water up to 3,000 feet below the surface in the Indo-Pacific ocean. The Crowned jellyfish is purple and blue in color, bioluminescent, and has the distinctive bell shape of crown jellies. The Crown jellyfish also has warts that protrude off its body. The Crowned jellyfish is one of the most venomous jellyfish, yet not to humans; therefore, it is eaten as a delicacy and even used medically in certain Asian countries. The Crowned jellyfish, like most other jellies, has tentacles that can be used to stun and capture its prey.

Crowned Jellyfish have a bell width between 9.84”-23.62” (25-60 cm), bell height of 8.7”-19.7” (22-50 cm), and overall length of 13”-30.7” (33-78 cm). The typical lifespan of the Crowned Jellyfish is 3-6 months with a weight between .04-.89 lb (.02-.4 kg).

Scaled collection of drawings of Crowned Jellyfish in front and side poses
The Crowned jellyfish, known as Cephea cephea, is a crown jellyfish usually found in the cold water up to 3,000 feet below the surface in the Indo-Pacific ocean. The Crowned jellyfish is purple and blue in color, bioluminescent, and has the distinctive bell shape of crown jellies.

Crowned Jellyfish have a bell width between 9.84”-23.62” (25-60 cm), bell height of 8.7”-19.7” (22-50 cm), and overall length of 13”-30.7” (33-78 cm). The typical lifespan of the Crowned Jellyfish is 3-6 months with a weight between .04-.89 lb (.02-.4 kg).

Scaled collection of drawings of Crowned Jellyfish in front and side poses
Crowned Jellyfish (Cephea cephea)
Height:
8.7”-19.7” | 22-50 cm
Width:
9.84”-23.62” | 25-60 cm
Length:
13”-30.7” | 33-78 cm
Depth:
Weight:
.04-.89 lb | .02-.4 kg
Area:
Scientific Name
Cephea cephea
Lifespan
3-6 months

Drawings include:

Crowned Jellyfish side elevation, front, top

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Fried Egg Jellyfish (Cotylorhiza tuberculata)
Scale illustration of an average Fried Egg Jellyfish with dimensions length compared to a human and jellyfish

The Fried Egg jellyfish, known as Cotylorhiza tuberculata, is a jelly with a smooth, translucent white top with an elevated yellow bell in its center. It is the white top with yellow center that gives the Fried Egg jellyfish its name, as it looks like a fried egg floating through the water. The Fried Egg jelly lives in the Mediterranean, Adriatic, and Aegean Seas and has a lifespan of only six months, from summer to winter. Its stingers are relatively mild, so sometimes the Fried Egg jellyfish provides shelter for smaller creatures or even has crabs that ride on its bell. The Fried Egg jelly usually just drifts in the water, but it is actually a very competent swimmer.

Fried Egg Jellyfish have a bell width between 2.36”-11.8” (6-30 cm), bell height of 1.6”-8.7” (4-22 cm), and overall length of 2”-10.2” (5-26 cm). The typical lifespan of the Fried Egg Jellyfish is 4-6 months.

Pair of elevation illustrations of the Fried Egg Jellyfish seen from the side and front
The Fried Egg jellyfish, known as Cotylorhiza tuberculata, is a jelly with a smooth, translucent white top with an elevated yellow bell in its center. It is the white top with yellow center that gives the Fried Egg jellyfish its name, as it looks like a fried egg floating through the water.

Fried Egg Jellyfish have a bell width between 2.36”-11.8” (6-30 cm), bell height of 1.6”-8.7” (4-22 cm), and overall length of 2”-10.2” (5-26 cm). The typical lifespan of the Fried Egg Jellyfish is 4-6 months.

Pair of elevation illustrations of the Fried Egg Jellyfish seen from the side and front
Fried Egg Jellyfish (Cotylorhiza tuberculata)
Height:
1.6”-8.7” | 4-22 cm
Width:
2.36”-11.8” | 6-30 cm
Length:
2”-10.2” | 5-26 cm
Depth:
Weight:
Area:
Scientific Name
Cotylorhiza tuberculata
Lifespan
4-6 months

Drawings include:

Fried Egg 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

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Cannonball Jellyfish (Stomolophus meleagris)
Dimensioned comparison drawing of the Cannonball Jellyfish compared to other jellyfish and a person

The Cannonball jellyfish, known scientifically as Stomolophus meleagris, is a medium sized jellyfish with a dome-shaped top that resembles a cannonball. The Cannonball jelly is also known as a cabbagehead jellyfish. The Cannonball jellyfish is most commonly found off the eastern coast of the United States and the Caribbean, but it can also be found in the Pacific. In the Pacific, the rim of the Cannonball jellyfish can be rimmed with blue, but elsewhere it is usually rimmed with brown. Although usually only a source of a mild sting for humans, there is a chance that the toxin the Cannonball carries in its nematocyst can cause cardiac issues.

Cannonball Jellyfish have a bell width between 7.1”-9.84” (18-25 cm), bell height of 5.5”-7.9” (14-20 cm), and overall length of 7.5”-10.6” (19-27 cm). The typical lifespan of the Cannonball Jellyfish is 3-6 months with a weight between .31-3 lb (.14-1.38 kg).

Set of scaled elevation drawings of the Cannonball Jellyfish viewed from the front and side
The Cannonball jellyfish, known scientifically as Stomolophus meleagris, is a medium sized jellyfish with a dome-shaped top that resembles a cannonball. The Cannonball jelly is also known as a cabbagehead jellyfish. The Cannonball jellyfish is most commonly found off the eastern coast of the US.

Cannonball Jellyfish have a bell width between 7.1”-9.84” (18-25 cm), bell height of 5.5”-7.9” (14-20 cm), and overall length of 7.5”-10.6” (19-27 cm). The typical lifespan of the Cannonball Jellyfish is 3-6 months with a weight between .31-3 lb (.14-1.38 kg).

Set of scaled elevation drawings of the Cannonball Jellyfish viewed from the front and side
Cannonball Jellyfish (Stomolophus meleagris)
Height:
5.5”-7.9” | 14-20 cm
Width:
7.1”-9.84” | 18-25 cm
Length:
7.5”-10.6” | 19-27 cm
Depth:
Weight:
.31-3 lb | .14-1.38 kg
Area:
Scientific Name
Stomolophus meleagris
Lifespan
3-6 months

Drawings include:

Cannonball Jellyfish side elevation, front, top

Downloads

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