Algal biomass is the harvested product from algae growing concerns. Algae fuels are the finished product.
Any of the numerous groups of chlorophyll-containing, mainly aquatic eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms 100 feet (30 meters) or longer.
These are distinguished from plants by the absence of true roots, stems, and leaves and by a lack of nonreproductive cells in the reproductive structures: classified into the six phyla: Euglenophyta, Crysophyta, Pyrrophyta, Chlorophyta, Phaeophyta, and Rhodophyta. SOURCE: Dictionary.com
Algae fuels are now under consideration as an alternative to fossil fuels.
Algae fuels are organic fuels
The harvested biomass contains oils, fats, and proteins. See Algae Oilfield.
The U.S. Department Of Energy is actively researching the potential of algae.