Acetabularia major

Acetabularia major

Acetabularia major is species of green algae from the family of Polyphysaceae.
Most Acetabularia green algae are fondly referred to as Mermaid's Wine Glass.
Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology.
Mermaid's Wine Glass - Acetabularia major This Acetabularia major algae looks like underwater fungi, the stalk is around 3-4 cm and the green cap is around 1 cm in diameter.  They are usually found in shallow sandy bottom.

Generally, the Acetabularia algae are fondly referred to as Mermaid's Wine Glass.

Despite their look, they are a Single-Cell Organism. It comprised of three anatomical parts: a bottom rhizoid that resembles a set of short roots; a long stalk in the middle; and a top umbrella of branches that may fuse into a cap. The single nucleus of Acetabularia is located in the rhizoid, and allows the cell to regenerate completely if its cap is removed. The caps of two Acetabularia may also be exchanged, even from two different species. In addition, if a piece of the stem is removed, with no access to the nucleus in the rhizoid, this isolated stem piece will also grow a new cap. Acetabularia major,Anilao,Batangas,Geotagged,Mermaid's Wine Glass,Philippines,Sea Algae,Summer


Thalli moderately calcified, consisting of a slender stalk and a terminal cap (up to 18 mm in diameter). Terminal cap made up of 63 to 85 sporangial rays, laterally attached to each other by calcification. Sporangial rays cylindrical-compressed, decreasing in diameter towards the centre of the cap, their terminal wall at the margin of the cap truncate to slightly emarginate. Distinct vertical notches present at the proximal half of the lateral walls of rays. Segments of corona superior 230 to 250 μm long, bearing 6 to 9 hairs or hair scars in an uniseriate row; segments of corona inferior 265 to 280 μm long with rounded, truncate or emarginate outer margins. Spores oval to spherical, up to 98 to 115 μm in diameter. Thalli up to 6 cm in height; the largest species among the genus Acetabularia.


Acetabularia crenulata var. major Sonder 1871
Acetabularia denudata Zanardini 1878
Acetabularia gigas Solms-Laubach 1895


(as Acetabularia major G.Martens)
Asia: China (Liu 2008), Japan (Okamura 1936), South China Sea (Phang et al. 2016), Taiwan (Lewis & Norris 1987, Berger et al. 2003, Shao 2003-2014, Anon. 2012, Anon. 2012).

South-east Asia: Indonesia (Silva, Basson & Moe 1996), Philippines (Silva, Meñez & Moe 1987, Ang, Sin Man Leung & Mei Mei Choi 2014), Vietnam (Tien 2007, Nguyen et al. 2013).

Australia and New Zealand: Queensland (Lewis 1987, Phillips 1997, Phillips 2002, Bostock & Holland 2010).

(as Acetabularia crenulata var. major Sonder)
Asia: Taiwan (Shao 2003-2014).

South-east Asia: Indonesia (Atmadja & Prud'homme van Reine 2014).

(as Acetabularia denudata Zanardini)
Asia: Taiwan (Shao 2003-2014).

(as Acetabularia gigas Solms-Laubach)
Asia: Japan (Okamura 1936), Taiwan (Lewis & Norris 1987, Shao 2003-2014, Anon. 2012).


Grows in colonies on rocks, shells and dead coral fragments in moderately wave-washed habitats near shores and in shallow waters.


Used as medicine for renal troubles.


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SpeciesAcetabularia major
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