A tar-like patch found in the upper North Atlantic supra-intertidal usually is:
A) a lichen.
B) a cyanobacteria.
C) sea hair.
D) a sponge.
E) a seaweed.

Question

Quizplus · Accepted Answer

A tar-like patch in the upper North Atlantic supra-intertidal is most likely a cyanobacteria, also known as blue-green algae. These patches are a common occurrence in areas where water movement is minimal and high levels of nutrients are present. They are often mistaken for oil spills or other forms of pollution, but they are a natural phenomenon. Cyanobacteria can be beneficial to ecosystems, but they can also be harmful if they overgrow and cause algal blooms.

A Tar-Like Patch Found in the Upper North Atlantic Supra-Intertidal