/r/algae

Photograph via snooOG

Oh god, they're so pretty. And small. Mmm. Algae.


The Algae Reddit

Algae - a very large and diverse group of eukaryotic organisms, ranging from unicellular genera such as Chlorella and the diatoms to multicellular forms such as the giant kelp, a large brown alga that may grow up to 50 meters in length. Most are autotrophic and lack many of the distinct cell and tissue types found in land plants such as stomata, xylem and phloem. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the Charophyta, a division of algae that includes Spirogyra and the stoneworts.

There is no generally accepted definition of algae. One definition is that algae "have chlorophyll as their primary photosynthetic pigment and lack a sterile covering of cells around their reproductive cells". Other authors exclude all prokaryotes[4] and thus do not consider cyanobacteria (blue-green algae) as algae.

Wikipedia: algae


Related Reddits


/r/algae

3,455 Subscribers

5

Can someone help me ID this algae in my aquarium? It is green, filamentous, branching, and attaches to surfaces at one point.

2 Comments
2025/01/18
22:48 UTC

3

Hi could anyone tell me what type of algae this is

5 Comments
2025/01/14
04:04 UTC

2

Is this algae? I found this beautiful slimy organism on the shore of Narragansett bay in Rhode Island. What is it?

1 Comment
2025/01/12
11:22 UTC

1

Our chlorella vulgaris!!

(The lamelle is broken and the camera is ehh but id say its still beautiful)

7 Comments
2025/01/11
13:51 UTC

5

What do we have here?

My first thought was it was chlorela, but I never really tried to identify algae, so it can be anything that is just small green round cell and I wouldn’t know. Anyone please chip in either your ideas 🙏🏻

Btw I took this sample from the jar where I was growing spirulina or so I thought

2 Comments
2025/01/09
19:06 UTC

4

How do some species of cyanobacteria live in non-cell differentiating forms?

Nitrogenase is very sensitive to oxygen existence inside the cell, thus heterocysts (for instance in Nostocales) get hydrocarbones from other cells, which produce it through photosynthesis, and then use it in pentose phosphate pathway. Other cells of these organisms get oxygen as a by-product. Oxygenic photosyntesis and nitrogen fixation cannot occur in the same cell. But Oscillatoriales don't have cell differentiation. How do they live?

5 Comments
2025/01/09
15:19 UTC

8

Help identifying algae?

Found in Red Rock Canyon National Conservation Area in Nevada. Super bright green algae like thing on surface of water. I didn’t edit the color at all, it’s just that green. Very stringy with some bubbles here and there.

3 Comments
2025/01/04
01:49 UTC

2

Vectors for C vulgaris

Im doing this work for uni that is like a thought in which we re going to modify it genetically so that it expresses carboxyssomes from S elongatus.It doesnt really have to work but we are having lots of trouble finding a backbone vector for it. Is there even one?

5 Comments
2025/01/03
19:39 UTC

3

Looking for info

This is Ethel. I have had her for many years, although she has only been living outside for 3 or four years.

I just noticed she seems to be growing something green on her belly. I am in the US, we are in the middle of winter.

I'm curious what type of algae would grow on a rust covered metal surface in the middle of winter?

I'm not too concerned, because I think if we have freezing temperatures, or after the sun comes out in the summer, it will go dormant. But if I wanted to try to control or kill it, just curious what people would use?

Thanks in advance for any information!

6 Comments
2024/12/29
20:23 UTC

3

spiruline + another microalgae?

Hi everyone, I have a spiruline culture and I´ve watch another microalgae, maybe chlorella ... Can I eliminated "chlorella" from spiruline culture with some technique or reactive? Thanks!

2 Comments
2024/12/27
16:22 UTC

2

Anybody going to Seagriculture?

I'm wondering if anyone here is also involved in algae cultivation at a professional level. I'm going to Seagriculture in March. Maybe we can get in touch!

4 Comments
2024/12/24
13:28 UTC

7

What do you think is the best algae to grow in a tank to eat, for beginners?

I'm really interested in algae and I want to start growing them by myself in a glass tank. I've heard about Ulva lacuta ,Caulerpalentillifera, Eisenia bicyclis or Schizochytrium. But I don't know where to start, I want to do it as a hobby to use them in the kitchen. Can anyone help me out?

9 Comments
2024/12/24
11:36 UTC

5

Chlorella Vulgaris

A while ago, I posted a picture of my chlorella vulgaris culture. Here I have some microscope pictures:

4 Comments
2024/12/23
19:23 UTC

9

Volvox

2 Comments
2024/12/23
15:00 UTC

1

Growing an algae wall?

Hi,

I'm new here and hopefully I'm in the correct sub-reddit to have my qns answered.

I have a freshwater aquarium, glass wall but I'm not sure how to grow algae on the walls. It's in direct/ indirect sunlight , with shrimps and snails and some java moss / red rooters / water lettuces.

Just whar am I missing to have a full glass of green algae growing on it? Or is there any products that can promote wall algae ?

1 Comment
2024/12/21
15:50 UTC

1

Glucosa-carbon source

Hi everyone, there is a risk of contamination if I use glucose as a carbon source in open ponds? Thanks

1 Comment
2024/12/20
02:22 UTC

1

Need help

Hello guys, I have a couple very basic questions but don't mind me since i'm extremely new to the topic. I have 6 liters of Basal Bold Medium and Chlorella Vulgaris in the exact amount for 6l of BBM. My question is do i need to dissolve BBM in water in order to put the algae in it, or do i just put it in this as it is? What is the exact procedure for creating a diy home photobioreactor? I'm very interested in this topic and I'm very happy i could get my hands on some algae and BBM easily but i have no idea what to do and the articles and research papers i've so far read have done nothing but confused me additionaly.

1 Comment
2024/12/18
18:31 UTC

1

Algae?

2 Comments
2024/12/17
18:33 UTC

1

Genus ID, sp not necessary

In the Unknown section, I need help with some IDs. Observe, iNat, Google images do not do well differentiating between similar appearing microscopic organisms. https://sixie6e.github.io/unknown.html Also, if you find errors in the Plantae section, I would humbly appreciate the corrections.

1 Comment
2024/12/17
11:15 UTC

14

A pretty colonial green

A complete Pediastrum duplex!

2 Comments
2024/12/17
03:54 UTC

1

What type of algae is this?

It’s in a salt water sea monkey tank on a window sill. It was seeded from my sea monkey aquarium but that algae is just a solid sheet of green and has no patterns.

1 Comment
2024/12/17
02:52 UTC

3

Algae or cyanobacteria? Not slimy and doesnt smell. Grows in small ball shaped masses mainly on hornwort. Appearance more felt like.

5 Comments
2024/12/16
22:29 UTC

2

Cultivation of Chlorella Vulgaris

Hello everyone, I‘m trying to cultivate Chlorella Vulgaris algae to investigate it‘s ability to bind CO₂ . To the question: I wonder what the bubbles, as you can see in the picture, mean for the health of the algae culture. Does anyone have an idea or can give me advice? Thanks in advance Cheers

2 Comments
2024/12/15
22:00 UTC

2

Phytoplankton identification

Could any one confirm this is nannochloropsis

2 Comments
2024/12/15
00:09 UTC

6

ID request. Freshwater, Mississippi River backwater 400x zoom

Anyone have any ideas on this? It looks like a diatom to me but beyond that I haven't figured it out. Thank you so much in advance!

5 Comments
2024/12/12
19:33 UTC

1

Freshwater dinoflagellate culture medium

Hello!

Hope you can help me with this, im seeking a medium for culturing freshwater dinoflagellates, most specific Ceratium hirundinella. Does anyone have some expierence in this species or some recipe i can borrow???

Thanks a lot!!

1 Comment
2024/12/09
15:01 UTC

2

Is any of this harmful to keep in my room?

So I have an aerogarden growlight, that I stopped using for growing grow pods but instead for providente light for my other plants. Doing so has left algae to grow in the water not being used by any plants. I've become interested in seeing how much can grow in there, so I've considered leaving the water open to the light and adding a little plant food to encourage growth. I am researching algae and have come across the toxicity of Cyanobacteria. My question is if keeping this in my bedroom will damage my health somehow. Could this produce enough toxic things into the air that my health, my plants health, or my Bearded Dragon's health could suffer for it?

Edit: I’ve scrapped the idea and dumped the algae but I’m still curious about the answer to this question

The Aerogarden in question, this question is not about the health of my plants T-T

2 Comments
2024/12/08
18:03 UTC

2

hello! does anyone know what kind of algae this is? or, i guess, more specifically, what species of seaweed this is? (it’s in florida)

1 Comment
2024/12/07
01:43 UTC

2

This probably sounds stupid but can I grow algae with mossy stones

2 Comments
2024/12/06
23:07 UTC

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