Marine Biology

Morphology

They are found in the fresh and marine habitats. They range from unicellular to multi-cellular, microscopic to macroscopic forms. Their thalli vary from free filaments to definetely shaped forms. The photosynthetic portion of the thalli may be moderately to highly calcified appearing in variety of forms as fan shaped segments, featherlike or star-shaped branches with teeth or pinnules, clavate or globose branchlets.