A highly diverse group of mainly aquatic, autotrophic, photosynthesizing organisms ranging from microscopic single-cell forms to multicellular forms, distinguished from vascular plants by the absence of structures such as true roots, stems, leaves and flowers. (Agrovoc)

The farming of aquatic organisms including fish, molluscs, crustaceans and aquatic plants with some sort of intervention in the rearing process to enhance production, such as regular stocking, feeding, protection from predators, etc. Farming also implies individual or corporate ownership of the stock being cultivated. [AGROVOC]

Aquatic Plants

Plants that grow in water either floating on the surface, growing up from the bottom of the body of water or growing under the surface of the water. [NALT]

Any microscopic or macroscopic vegetal organism living in the aquatic environment, excluding bacteria and viruses. [AGROVOC]

Wetland Plants

Plants adapted for survival in soils frequently saturated with surface or groundwater. [NALT]

Shellfish is a colloquial and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms.