Anabaena is a genus of filamentous cyanobacteria that exist as plankton. As predators, they prey upon unicellular or filamentous algae, bacteria, and microfungi. Some are unicellular, while others are filamentous and branching. They range from unicellular to filamentous and include colonial species. The lifecycle of filamentous fungi including "Aspergillus" spp. Virions are enveloped and can be spherical or pleomorphic and capable of producing filamentous virions. In the environment it is found growing as filamentous hyphae. Tadpoles consume small quantities of filamentous green algae and desmids. Bryophytes and algae are common with an abundance of filamentous green algae. A new clade (as yet unnamed) of six viruses infecting filamentous fungi has been reported. Cladophora is a genus of reticulated filamentous Ulvophyceae (green algae). They are herbivorous fish specializing in filamentous algae. Other morphologies have also been described&colon; spindle shaped, rod shaped, filamentous, icosahedral and spherical. The virion is pleomorphic; the envelope can occur in spherical and filamentous forms. Applying this growing technique to filamentous fungi leads to difficulties.