Anthopleura elegantissima, Aggregating Anemone | ©Marlin Harms (North Point, Morro Strand State Beach, Morro Bay, California, US)

This colonial anemone with tentacles greenish to pinkish, can be found on rocky, tide swept shores along the Pacific coast of North America.

An interesting fact of these anemones, recently studied, is that High-intertidal individuals are exposed aerially up to 18 h each day, unlike low-intertidal individuals which may be continuously immersed over many days [read more].

Animalia - Cnidaria - Anthozoa - Hexacorallia - Actiniaria - Actiniidae - Anthopleura - A. elegantissima

"Giant Green Anemone" (Anthopleura xanthogrammica)

Also known as the Green Surf Anemone, Green Anemone, Solitary Anemone, Rough Anemone, and the Giant Tidepool Anemone, Anthopleura xanthogrammica is a species of Actiniid sea anemone that inhabits low to mid intertidal zones in the Pacific Ocean, ranging from Alaska to Southern California and rarely down to Panama. Like other sea anemones A. xanthogrammica sports several nemoatocyst lined tentacles which are used to paralyze and capture prey that wanders too close. Phoyosynthetic algae of the genus Zoochlorella and dinoflagellates of the genus Symbiodinium live in the tissue and gut of A. xanthogrammica, in this symbiotic relationship they will provide nutrients to the anemone via photosynthesis (partly giving the anemone its green coloration) and in turn they get a safe place to reside. 

Classification

Animalia-Cnidaria-Anthozoa-Hexacorallia-Actinaria-Nyantheae-Thenaria-Actiniidae-Anthopleura-A. xanthogrammica

Image: Stan Shebs

Beadlet anemone / ウメボシイソギンチャク

Actinia equina

The colony of Beadlet anemones.

ウメボシイソギンチャクの群れ。

Classification
Animalia Cnidaria Anthozoa Actiniaria Actiniidae
動物界 刺胞動物門 花虫綱 イソギンチャク目 ウメボシイソギンチャク科

Photo taken at Tokyo Sea Life Park, Japan

2

Beadlet Anemone (Actinia equina)

…a species of sea anemone that can be found on the rocky coasts of the United Kingdom, Western Europe and the Mediterranean. This anemone is highly adapted to its environment and can thrive in high temperatures and dryness, some have even been found in areas with low salt. They also possess a ring of blue tentacles called acrorhagi which are used to fight off other anemones that attempt to invade their space.

Phylogeny

Animalia-Cnidaria-Anthozoa-Hexacorallia-Actiniaria-Actiniidae-Actinia-equina

Image Source(s)

Beadlet anemone  (Tomate de mar)

Actinia equina (Actiniaria - Actiniidae), the Beadlet anemone, is a considerably versatile intertidal sea anemone, with a wide array of color variation, from green to red. The most common hue is rust-red.

In the beadlet anemone, the tentacles (up to 192) are arranged radially in six circles around the mouth (the opening to the gastrovascular cavity). Bright blue spots (shown in the photo), called acrorhagi, are below the tentacles on the outer margin of the column and look like warts.

This sea anemone is found primarily in the North Atlantic Ocean and the Mediterannean Sea, but populations also exist stretching down along Africa’s Atlantic coast.

Reference: [1]

Photo credit: ©Jeroen Zetz

Locality: Scherpenisse, Zeeland, Netherlands

2

Brooding Sea Anemone (Epiactis prolifera)

Also known as the proliferating or small green anemone, the brooding sea anemone is a species of sea anemone endemic to the north-eastern Pacific. This species is unique as it is protogynic hermaphrodite, meaning it starts its life as a female and when it reaches a certain size it develops testes and lives as a proper hermaphrodite for the rest of its life. This species gets the name “brooding” as its young will remain within its mother’s gastrovacular cavity during early development. Like most cnidarians this anemone is a suspension feeder, disabling any prey that happens to stumble upon its tentacles.

Phylogeny

Animalia-Cnidaria-Anthozoa-Hexacorallia-Actiniaria-Actiniidae-Epiactis-prolifera

Image Source(s)

Condylactis gigantea

A stunning close up of the so called Giant Caribbean anemone, Condy anemone, and Pink-tipped anemone, with a shrimp on it.

This beautiful anemones are scientifically named Condylactis gigantea (Actiniidae), and are commonly found in the Caribbean, most specifically the West Indies, and the western Atlantic, ranging from southern Florida through the Florida keys. They can be seen growing in lagoons or on inner reefs as either individuals or loose groups, but never as colonies.

The Condy anemone is approximately 15 cm high and 30 cm wide, making the disk diameter approximately 40 cm. They can exibit a variety of colors: white, light blue, pink, orange, pale red, or light brown. The mouth is surrounded by 100 or more tentacles, each long and tapered with pink-, scarlet-, blue- or green-ringed tips.

Reference: [1]

Photo credit: ©Courtney Platt

Locality: Grand Cayman

Crimson Anemone  (Snakelock anemone, Chevron-tentacle anemone, Fernald brooding anemone)

Macrophotography of Cribrinopsis fernaldi (Actiniaria - Actiniidae), a sea anemone from the North Pacific Ocean. commonly referred to as Crimson Anemone, although the overall color may be white, yellow, or pink.

These sea anemones up to 20 cm tall, have narrow zigzag lines, often red, across the tentacles. Tentacles are long and may droop down. It also has red lines radiating outward on the oral disk.

This anemone broods its young internally.

References: [1] - [2]

Photo credit: ©Conor McCracken

Locality: British Columbia, Canada

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