/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

3,036 Subscribers

2

ID REQUEST!!

1 Comment
2024/02/12
09:03 UTC

1

What can I use as an algae fertiliser that's not expensive?

I am trying to grow algae in a small bottle of salt water.

The purpose is to create a live food source for my sea monkeys.

I am following the instructions in this video:

https://youtu.be/gTRl8cu7jlc?si=G_xO5FOFYTqe1yMr&t=234

At 3:54, he shows the food source. But you need both bottles and they cost $20 each.

Is there something similar I could use that's cheap? I noticed there's also seachem flourish, but it's not specific to algae but it has some of similar nutrients.

1 Comment
2024/02/10
01:39 UTC

1

ID Request!

Hello! I have been trying to identify this algae for a couple months. It is freshwater, in my aquarium. At large, it is bright to dark green, and filamentous. Further, I think there may be two different species in here? There are the really long cylindrical cells, but there are also some significantly smaller connected rectangular cells?

If more photos would be helpful, please let me know!

3 Comments
2024/02/08
23:37 UTC

1

Question

I’m currently culturing chlorella vulgaris for a home experiment on growth rate for my biology class in highschool. I’m using a disinfected container with distilled water which I put culture salts and growth medium (f/2) but I only bought enough for around 500 ml of water but I’m using 2500 ml of water. Will this be a problem or do I need more nutrients?

6 Comments
2024/02/08
00:50 UTC

3

ID for stringy green algae on Northern California coast?

Can anyone with expertise in marine algae help me ID this multicellular green specimen from San Gregorio State Beach (San Mateo County), California, USA? It was growing on a coastal cliff slightly below the high tide mark. To the naked eye it looks like green strings, but under a microscope the strings resolve into 3D multicellular structures with about 40 cells around the diameter of the "string." Plant ID apps are useless when it comes to algae, so I'm turning to random Internet strangers!

In the wild, just below high tide:

https://preview.redd.it/2x19qwudn8hc1.jpg?width=1920&format=pjpg&auto=webp&s=d57e6f439554897cfa0d9f457f4a242db140bf30

In the laboratory, under the dissecting scope at 45x total magnification:

https://preview.redd.it/8gyhvd5fn8hc1.jpg?width=2560&format=pjpg&auto=webp&s=b608e25da7804ff8beec744968a0774ae7c6f920

In the laboratory, under the compound scope at 400x total magnification (1 tick mark = 2.5 um):

https://preview.redd.it/xt8gk7ngn8hc1.jpg?width=2560&format=pjpg&auto=webp&s=1bae9fad56629bd88bc84c51aada51430671626e

9 Comments
2024/02/07
22:20 UTC

2

Question about sequestering

I know sequestering CO2 is a big topic especially with algae because of their CO2 intake, but I read that Cyanobacteria is nitrogen fixing so could the same be done with N2?

10 Comments
2024/02/07
02:27 UTC

9

ID Request

Hi guys i need some help! I found some green guys in my Duckweed cultivation Container (besides the duckweeds of course). The magnifition is 400x. My first Research Lead to chlamydomonas sp. But this guys Lack the flagellates. Do you have any other idea? Thanks in advance (and sorry for the crappy picture :D)

7 Comments
2024/02/06
12:12 UTC

2

How to grow algae

I want to grow micro algae next to my brine shrimp tank and was wondering how to do that ? The cheapest methods possible if anyone can help me out. The algae must be in salty water.

8 Comments
2024/02/05
04:42 UTC

2

Identify Algae?

Not sure if this is just dead algae or something to be concerned about

2 Comments
2024/02/05
04:18 UTC

2

Game: name that algae

This started growing on the plastic leaf I have in my betta tank. I rinsed it with very hot water and have cleaned the “growth” repeatedly but it still comes back. Any recommendations on how to get rid of it? Thanks.

0 Comments
2024/02/04
04:31 UTC

13

Lovely Dinoflagellate

Gymnodinium catenatum in the shape of a heart

0 Comments
2024/01/30
15:57 UTC

12

A little Asterionella

0 Comments
2024/01/28
01:41 UTC

4

It might be a Thalassiosira from a brackish body of water in Colombia

0 Comments
2024/01/26
15:41 UTC

2

Does someone know what kind of algae is this and how to get rid of it?

1 Comment
2024/01/26
01:29 UTC

1

What is this algae and how do I get rid of it?

6 Comments
2024/01/24
19:15 UTC

3

Trichodesmium?

Walking at Weeden Island today we saw white blobs in the shallow, brackish water around the mangroves. What do you think it is? Apologies for the photo quality.

1 Comment
2024/01/21
20:58 UTC

7

What are those circles!

I have sended a post here about my cyanobacteria experiment and after a few weeks it died, went dark and smell bad but I kept it so it grew again but this time it shows different structure. I want to learn what is the reason. Cyanobacteria's specy is oscilatoria

4 Comments
2024/01/20
12:21 UTC

3

Is this algae? besides whats circled in blue everything else is underwater. Whats circled in blue is floating on top. The black streaks on bottom are underneath water level. This cup has been out for at least 3 days and may have a squirt of a flavoring. Bc it's growing underwater I don't think mold

2 Comments
2024/01/18
22:36 UTC

9

Is this algae or Iron Bacteria

Found this pipe leading into a beck and found this orange substance coming from the pipe. Any ideas if it’s algae or it is Iron Bacteria, and why causes it?

9 Comments
2024/01/17
14:22 UTC

1

Reading Material Suggestions

Hi. I am looking for resources concerning bacterial, viral, oomycete, and fungal diseases of fresh water algae. Can anyone point me in the right direction?

0 Comments
2024/01/13
15:03 UTC

13

Sample from a sea bog at the Colombian north coast

6 Comments
2024/01/11
16:29 UTC

3

Living rain coat

Dear Algae community, I'm an Fashion design student and need your help. I creading an living rain coat where algae are growing on. my problem is now I don't have enough algae. because it reed to be done in 3 weeks. I have to collect is somewhere. Do you have an Idea where? Xc they have to life in fresh water. Do you have any Ideas where I can get algae and what can I do that they are growing faster.☀️

I built a shower in the store of my friend XD. I hope someone can help me !

3 Comments
2024/01/09
01:02 UTC

11

Is this algae? Came out of my dehumidifier drain hose

13 Comments
2024/01/08
23:43 UTC

3

Mmmmm sweet sweet algae

This is a bottle someone at work has had for 2 years or more and regularly drinks from 🤢

0 Comments
2024/01/08
13:37 UTC

4

Is caulerpa filiformis edible?

Saw lots at the beach at Newcastle, Australia

0 Comments
2024/01/08
04:10 UTC

6

What kind of brown macro algae is this? It’s in my saltwater tank.

It’s been in my tank for months. So far, I have 2 macro algae in my tank.

2 Comments
2024/01/04
21:48 UTC

9

Scenedesmus morphology change.

Hi, I' m new in this sub, but I have some experience working with microalgae, but recently I'm noticing this change im my culture(is not a pure culture, as yoy can see some diatoms and chlorellas) and I havent been able to figure why is this change happening, apreciate any feedback or help to figure it out this, thanks!! (The picture is a 40x in a cx21 microscope)

0 Comments
2024/01/03
21:20 UTC

7

Help with identification of family/genus?

Found in Honolulu, Hawai'i, USA growing on some rocks near the shoreline

I'm not too familiar with marine macroalgae, but my first thought was some sort of Caulerpa. Length is about a centimeter

1 Comment
2023/12/27
02:07 UTC

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