Here is a macro 1:1 of the Hollow Green Weed algae, growing on the rock formation. Press "L" for large

Spanish: Aproveche para tirar un macro del alga pegada a las rocas. Oprima la "L" para Grande.

Location: north of Washington oaks state park beach, Palm Coast, Florida.

Data: Olympus EPL2, 50mm Zuiko and 50mm extension tube, handheld, 1/320, ƒ/11, ISO 200. (Note: Exif data never show f/stops or FL of manual focus lenses with adapters.) Process: Edit raw file on Olympus Viewer 2. Sammy Santiago Profile/My Flickr Blog

Looking up the tree trunk with sunlight filtering through the canopy.

GTF sample, 10x*1.25, DF, HF B

CV15 III with 6-stops filters, and GND 0.75.

This grebe was swimming in a sea of algae on Commonwealth Lake.

Sony a6300, 63 photos, Goerz type condenser insert set, UV/Oblique/pol, Nikon Microphot, 20x BD Plan

In the splash zone on rock rejected from the output of the lime kiln at Lime Kiln State Park on San Juan Island in Puget Sound

100x S-plan Apo

Lembeh, Indonesia

GTF sample, 4x*1.25, FLUO-C4, HF C

HDR - illuminated by the late afternoon sun

C. J.R. Devaney

Macro of Nature

Nikon Z fc, Nikkor Z MC 50mm

f25, 1/125, ISO100

@BeatricexMorgana

I can not identify it.....

Sans craindre le vent et le vertige - Ojard

Keep the river free of algae

walking on the beach

Yellowstone in winter is a true wonderland. Unbelievable. Wish I knew what I was doing then and got more good shots but this one is a keeper. :)

Yellowstone National Park: Montana: USA

One of the local lakes at Teardrops covered in the Algae

Fans of "Stranger Things" might understand.....

I used Urban's Black and White grunge preset on these algae flowing in a stream.

Red algae in a herbarium collection

Les Amoutous, Mèze, Bassin de Thau, France

We're Here observing DIY bioreactors

Today I took a short hike to this place where I thought I would see some mud cracks due to the drought. To my surprise, I found a pool of colorful water. I suspect the colors were caused by the algae as some of the water puddles in the salt ponds were quite colorful. The sight of this colorful pool was actually quite eerie especially there was nobody around in this area which is quite far out into the bay. As I did not have my ultrawide angle, I had to take multiple shots and stitch them into a pano.

Camera: Canon EOS 20D

Lens: EF 28-135mm F3.5-5.6 IS USM

Algae-choked pond on the North Macedonia-Albania border

The brilliant algae covering the moving stream that carries the hot water from the source to the hot pools

Nikon W300 Coolpix

12th October 2023

Coonarr Beach Bundaberg

Australia

Cyanobacteria (blue-green algae)

Cyanobacteria (blue-green algae) are a type of microscopic, algae-like bacteria which inhabit freshwater, coastal and marine waters.

Cyanobacteria photosynthesise like plants and have similar requirements for sunlight, nutrients and carbon dioxide to grow and produce oxygen. There are many different varieties of cyanobacteria. While often a green or blue-green colour, they can also be white, brown, blue, yellow-brown, or red.

If conditions are suitable, cyanobacteria can increase to excessive levels and form visible ‘blooms’ which can lead to poor water quality and the potential for toxicity.

Cyanobacteria can cause environmental problems, disrupt drinking water supplies, recreational activities and water-dependent industries, and pose a risk to livestock, wildlife and human health.