Talk:Marimo

Untitled

There is a link to Lake Zeller in German Wikipedia. It is apparently called Irrsee. Are we allowed inter-wiki links in the main article? Or should we wait until someone writes an English language article? Richard W.M. Jones 13:00, 2 Apr 2005 (UTC)

No harm in being informative, so I'll add the German article link in parentheses into the main article. —Tokek 17:34, 13 May 2005 (UTC)

Large parts of this are just direct copy/pastes from http://www.marimoballs.com/ - Needs rewrite. —Preceding unsigned comment added by Djsmiley2k (talk • contribs) 09:22, 12 May 2011 (UTC)

group

"Their scientific name is Cladophora aegagropila and they belong to the Cladophora sauteri group."

This doesn't make much sense, but I have seen this similarly worded on a page that was most likely used as source. Any more information on FT Kützing and AE Sauter's work? —Tokek 17:34, 13 May 2005 (UTC)

You've probably found the page I used as a source. I'm no expert on scientific names of species and groups, so ... Richard W.M. Jones 09:01, 14 May 2005 (UTC)

link

I made new page Cladophora into a link to this page. This is almost certainly wrong, but hopefully will inspire someone who knows what they're doing to make a correct page. Richard W.M. Jones 09:11, 14 May 2005 (UTC)

On spherical being non-optimal

Is it right to write that the spherical shape is suboptimal and is what restricts growth?

Growth restriction: assuming it's only the outermost layer that gets enough light to grow, this situation shouldn't change as the ball grows further. Unless the core disintegrates, trouble only starts when the ball is so big it can't roll or get deformed under its own weight. Marimo balls seem to stop before this happens.

Sphere as suboptimal: It is true that a sphere has the lowest surface area to volume possible, which means that as little as possible of the algae cells are out in the open. But the surface area of a sphere is 4*π*r^2 whereas the area of the lakebottom under the ball, a circle, is only π*r^2. That gives 4 times as much area exposed to light and fresh water as a flat mat would get, for a given amount of available lakebottom.

But the math gives another reason for restricting the size of the marimo ball. When you split a spherical mossball into two new spherical mossballs, the sum of their volumes are of course the same as that of the original ball, but between them, they have 26% more surface area! That makes it beneficial for the marimo to be in several smaller balls instead of one big. EverGreg 12:28, 20 August 2007 (UTC)

• Isn't it important to note the the specis is classified as endangered in Japan? --210.165.35.2 (talk) 09:07, 27 August 2008 (UTC).

Popular Culture

The listing of anime is insignificant and should probably be deleted (but keep the Marimokkori). Does the wiki article on chairs have a list of every anime that has a chair in it?--Jarvik7 (talk) 02:54, 12 February 2009 (UTC)

Does the wiki article on chairs have a list of every anime that has a chair in it?. It probably did have at one time... sigh.

I've gone ahead and removed the inconsequential anime references in this as per WP:IPC, shortened the Mirimokkori entry (not so sure I needed to do that, but it read like a promotion of Marimokkori, better to keep it short. People following the link will quickly discover it's primary claim to fame/marketing gimmick) EasyTarget (talk) 16:55, 17 July 2009 (UTC)

What about goobabs? 2601:18E:D102:5BB0:E224:F980:6265:7707 (talk) 15:59, 12 May 2025 (UTC)

Geographical distribution contradiction

"Only found in Japan, Iceland and Estonia" but "discovered in Austria"? Or does this mean the colonies of balls only?--Trɔpʏliʊm • blah 20:44, 24 August 2009 (UTC)

Used to grow in The Netherlands too

"Populations of A. linnaei seem to have become extinct in all but one location (Boven Wijde, province Overijssel), where we found very small amounts of attached filaments."

Ref: http://link.springer.com/article/10.1007%2Fs10452-009-9231-1#/page-1 — Preceding unsigned comment added by 80.101.80.116 (talk) 18:53, 30 March 2016 (UTC)

Marimo are sometimes sold for display in aquariums

A primary reason for Marimo Ball are not just for display in aquariums, they are to keep the pesky algae off the aquarium. Marimo Balls use the same food that regular algae does.Easeltine (talk) 01:22, 16 April 2020 (UTC)

I call aquarium marimos Goobabs. 2601:18E:D102:5BB0:E224:F980:6265:7707 (talk) 16:00, 12 May 2025 (UTC)

Scientific name changed

Hello, this is now Aegagropila brownii (Dillwyn) Kützing 1854:

Masaru Kono, Akina Obara, et al.: Photoinhibition risk in marimo (Aegagropila brownii) during ice transition periods based on field observations and laboratory assessments. In: Phycological Research, 2025-09-28, doi:10.1111/pre.70013.

Beneath the ice: spring sunlight triggers photoinhibition and recovery in lake Akan Marimo. On: EurekAlert, 30-Sep-2025.

See also:

https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=162062

https://www.algaebase.org/search/species/detail/?species_id=59088

Ernsts (talk) 08:46, 2 October 2025 (UTC)