Fun Giant Green Anemone Facts For Kids

The Giant green anemone (Anthopleura xanthogrammica) is a beautiful species of sea anemone. The species belongs to the family of Actiniidae and is known by several names in different places such as the giant tidepool anemone, rough anemone, green surf anemone, giant green sea anemone, and many more.

The giant green anemone has a length and height of 6.6-6.8 in (17-17.5 cm) and 11-11.8 in (28-30 cm) respectively which makes them the largest sea anemone species. Also, the tentacles are conical and 9.8 in (25 cm) wide.

When the species dwell in the water, the color remains bright or olive green while the giant green anemone comes out, the pale brown color appears on the body.

The species is primarily found in the Pacific Ocean and is distributed from different United States states such as Alaska and California to the Republic of Panama.

The giant green anemone generally has its abode in sandy or rocky shorelines and is found in tide pools of 590 in (15 m) deep as well. The International Union for Conservation of Nature has not evaluated the status of the species yet.

Keep on reading to learn more interesting facts about the Giant green anemone. If you want to know more exciting information about different animals, check out our sea anemone and fire coral facts.

Giant Green Anemone Interesting Facts

What type of animal is a Giant Green Anemone?

The giant green anemone (Anthopleura xanthogrammica) is a fascinating species of the inner shore sea anemone. The species is a carnivore and the anemones primarily prey on crabs, mussels, sea urchins, and small fishes.

What class of animal does a Giant Green Anemone belong to?

The giant green anemone (Anthopleura xanthogrammica) belongs to the class of Anthozoa, Actiniidae family, and Anthopleura genus.

How many Giant Green Anemones are there in the world?

The exact population of the green sea anemone is unknown now, but the species is largely distributed from the west coast of North to Central America. The species has also been found in other countries of North America such as Canada, also some were spotted on the east coast of Russia as well.

Where does a Giant Green Anemone live?

The green sea anemone is primarily found in the Pacific Ocean and is distributed from different states of the United States such as Alaska and California to the Republic of Panama. The species has also been found in other countries of North America such as Canada, also some were spotted on the east coast of Russia as well.

The concrete pilings in open bays and harbors also serve as their habitat.

What is a Giant Green Anemone's habitat?

The giant green anemone generally has its abode in sandy or rocky shorelines and is found in tide pools of 590 in (15 m) deep as well. The species prefers to live in cold water with a temperature between 15-22 degrees Celcius and thrives in mussel beds.

Who do Giant Green Anemones live with?

Like other sea anemone species, the green surf anemone is quite shy and solitary. Some of the anemones are also found in groups of not more than 14 individuals in a particular region.

The anemones living in groups generally maintain some distance from one another. But the anemones could become aggressive if removed from one colony. In such situations, they use their acrorhagi or tentacles to attack.

How long does a Giant Green Anemone live?

The average lifespan of these bright green anemones is around 80 years but if kept in captivity, the species can live up to 150 years.

How do they reproduce?

The giant green anemone follows the process of polygynandry which means the anemones mate with multiple partners. Spawning generally occurs when the water temperature rises and the breeding season occurs mainly in the summer season.

The cold water does not provide a suitable environment to spawn or mate. The anemones generally become sexually mature between the age of 5-10 years and after reaching adulthood, the species develop gonads or reproductive organs. The adult anemones release the gametes during the night.

Reproduction takes place through the process of external fertilization in which the female anemones releases thousand of eggs, similarly, the male anemones release sperm that disseminates quickly. Apart from the production of the gametes, no parental care is involved.

What is their conservation status?

The anemones are widely distributed in several countries of North America such as Canada and the United States. In the US, the species can easily be found in several regions such as the Oregon Coast, South California, Alaska, and many more.

As the anemones are not threatened or endangered, the International Union for Conservation of Nature has not evaluated the status of the species. Apart from this, the status of anemones is not involved in the US Federal List, State of Michigan List, and CITES.

Giant Green Anemone Fun Facts

What do Giant Green Anemones look like?

The giant green anemones are one of the most beautiful species found in the aquatic world. They are primarily found in bright green or olive green and when their body is not submerged in water, they appear pale brown.

They have huge tube-like bodies with conical tentacles that contain cnidocytes or stinging cells. The tentacles are either green or blue depending upon the sunlight received by the anemones.

How cute are they?

The giant green anemones are also known as rough anemones, green surf anemones, giant green sea anemones, and tidepool anemones in different countries. The species is one of the adorable animals found in aquatic life. The anemone's bright green color and mouth surrounded by numerous tentacles fascinate everyone. In the glaring sun, they look even brighter.

How do they communicate?

The nervous system of anemones is regarded as the primary medium of communication. The species have a nerve net through which they transmit signals in all directions.

When exposed to ultraviolet rays, the body, and tentacles of anemones contract. Also, the wounded anemone's pheromones or the chemicals help to warn or alarm other anemones. The giant green anemones also release anthopleurin or poisonous chemicals and retract the oral disc and tentacles to protect themselves from predators.

How big is a Giant Green Anemone?

The giant green anemones have a length and height of 6.6-6.8 in (17-17.5 cm) and 11-11.8 in (28-30 cm) respectively which makes them the largest sea anemone species. The giant green sea anemone is 40-50 times larger than the Gonactinia prolifera sea anemone found in several parts of the European continent.

A few of the giant green anemones are twice the size of the starfishes.

How fast can a Giant Green Anemone move?

The exact speed of the giant green anemones is not known as of now. Also, the species generally do not move very often. To catch their prey, the Anthopleura xanthogrammica usually use their tentacles but sometimes to avoid predation, they use the basal pedal disks to move slowly.

How much does a Giant Green Anemone weigh?

The average weight of the giant green anemones is not known but a few larger sea anemones generally weigh around 400-440 lb (181-199 kg) and by looking at the huge size of these aquatic species, we can easily imagine their weight.

What are the male and female names of the species?

There are no specific names given to the male and female species of giant green anemones.

What would you call a baby Giant Green Anemone?

No such names are used to refer to the babies of giant green anemones. People generally refer to them as young or juveniles of giant green anemones. In young anemones, there would be no gonads or reproductive organs.

What do they eat?

The species is a carnivore and primarily prey on crabs, mussels, small fishes, and sea urchins. These anemones usually inhabit mussel beds in the cold water as the availability of prey increases in the cold water.

They use their tentacles to catch the prey and bring it to their mouth. The anemones only prey once or twice a month due to their slow metabolism.

Are they poisonous?

The giant green sea anemones are shy and solitary, also they generally maintain distance from humans. The creatures are so huge and have anthopleurin, a poisonous chemical that they release to avoid predation or paralyze their prey.

Despite this, the species are not considered harmful or pose any danger to humans. But for several aquatic creatures, the anthopleurin could be lethal. Their tentacles have stinging cells which help them to catch the prey.

Would they make a good pet?

People generally do not consider giant green anemones as pets because an aquarium would not serve as a habitat for them. Unlike fishes, the anemones are very difficult to care for and a new habitat such as an aquarium could lead to the death of the creature.

In natural habitats, the anemones generally remain attached to the rocks. Some people do keep them but in a saltwater aquarium.

The species is one of the biggest sea anemones and their length and height are 6.6-6.8 in (17-17.5 cm) and 11-11.8 in (28-30 cm) respectively, thus it becomes important to have a big-sized aquarium for them. Also, the temperature of the cold water should be between 15-22 degrees Celcius.

So if you want to keep them as pets, you must have the proper knowledge and experience to look after them.

Did you know...

Like the green anemones (Anthopleura xanthogrammica), the Clonal anemones (Anthopleura elegantissima) are native to the countries of North American countries.

The green anemones use their mouth for both, eating and excretion. The species has a broad and flat oral disc.

The main reason behind the bright green appearance of the bright green color body is the presence of algae on their epidermis.

How has the Giant Green Anemone adapted?

The green anemones primarily inhabit rocky shores and are found in tide pools of 590 in (15 m) deep as well. The bodies of the species are generally very soft and flexible, unlike other aquatic animals such as crabs and fishes.

Also, they are attached to rocks and catch their prey with the help of tentacles. Thus they can survive high-wave activities.

How are Giant Green Anemones affected by climate change?

The beautiful bright green anemones primarily live in cold water but when they are exposed to warmer conditions, they start losing the algae present on their epidermis. Research also suggests that a warmer climate reduces the level of metabolism in the species.

Some even consume microplastics which also carry several pollutants and cause different kinds of diseases to the species.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other Anthozoa including coral and brain coral.

You can even occupy yourself at home by drawing one on our Giant green anemone coloring pages.