Cyanobacteria are of cyan color, which is a turquoise blue color, and they are also referred to as blue, green algae. The green algae are green in color. Cyanobacteria are referred to as prokaryotic organisms, while the green algae are referred to as eukaryotic organisms. Cyanobacteria have the ability to photosynthesize, which means they can produce their food by themselves with the help of sunlight. Cyanobacteria release a kind of toxin that is dangerous to some aquatic organisms, such as snails, insects, and some plants.
This makes them be unfavorable to the aquatic ecosystem. The toxin is also toxic to the zooplankton, while the green algae serve as a source of food for the zooplankton. Cyanobacteria do reproduce asexually through spore production, binary fusion, or fragmentation, while green algae can reproduce both sexually and asexually. Cyanobacteria are larger in size, and are multi-cellular organisms, while green algae are unicellular organisms. Cyanobacteria can survive several habits than green algae.
There are a lot of differences between cyanobacteria and green algae. Cyanobacteria are prokaryotic micro-organisms; this means they are organisms who do not have nucleus or any other organelles in their cells. While green algae are eukaryotic organisms, that is, they are organisms which have nucleus and other organelles in their cells. Cyanobacteria are always considered to be dangerous to their environment, there presence is harmful to other microorganisms around. While green is less harmful.
One thing to notice about cyanobacteria is that, they reproduce only by asexual means of reproduction and they also produce their own food through photosynthesis. Green algae, on the other hand, also manufacture their own through photosynthesis, but they reproduce by both sexual and sexual means of reproduction. Cyanobacteria have always been considered to contain some toxic substances which are harmful to other organisms around their habitat, but green algae have some nutritional values to most of the green plant.