Seaweed

Seaweed is a loose colloquial term encompassing macroscopic, multicellular, benthic marine algae. The term includes some members of the red, brown and green algae. Seaweeds can also be classified by use (as food, medicine, fertilizer, industrial, etc.).

Seaweed is sometimes referred to as a type plant, although sometimes algae is part of its' own classification.

Appearances
Super Friends
 * Season 1: The Power Pirate