University of Michigan ecologist Bradley Cardinale, a professor at the School for Environment and Sustainability. Photo taken July 1, 2016, at U-M's E.S. George Reserve near Pinckney, Mich. Photo by Daryl Marshke/Michigan Photography.

California Treefrog (Pseudacris [Hyla] cadaverina)

Algae fruiting body, these are associated with urchins in the lower glen rose formation, creataceous, Comal county, Texas. 2 cm diameter

been a bit warm recently - lake completely covered in algae - would have more impact without the shadows, zoetermeer, the netherlands

Algae on surface of stagnant water. For use as a texture layer.

on a peaceful algae covered pond, lurks extreme danger...

Near by the ocean. Algae and shells in Brittany (North-West in France).

On a boulder at Goat Cove Brook where it meets the ocean.

Algae growing on surface of media in pots.

This mat, I think it is algae, was near a bubbling mudpot slightly above Blood Geyser. I treminded me of the shape of stromatolites I have seen in the past.

Elevation 2280 meters (7500 feet)

Artists' Paintpots Trail

Yellowstone National Park

sw16 050

A large mat of red-brown algae in the runoff from a geyser field--with a dead tree weathering in the foreground.

Algae growing on surface of media in pots.

Big Island, Hawaii

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Old stomping grounds over at Tourmaline Surf Park in Pacific Beach. Longboarder heaven out there. All those rocks weren't there a few years ago...

Algae is a food source for shore flies, seen resting on this Echinacea leaf.

Girdwood, Alaska. Turnagain Arm mudflats with intertidal algae glowing in the evening sun, with the Chugach Mountains in the distance.

Clean and disinfect plug trays before use.

Smooth carpets of algae line the creek's edge.

Near Mendenhall Glacier, Juneau, Alaska

at itampolo beach.

Wicomico Co., Maryland (3/31/2018).

A closeup of the algae pond on the roof

Algae under the microscope

Growth had taken hold of the boat after sitting for so long unkept.

A very special lake has reg algae growing on top.

I guess we haven't been sitting in it enough...