Thalassia testudinum Common in lagoons, where its tangled roots help stabilize the soft bottom. Its dense leaves feed many reef grazers.
Horizontal runners connect feathery blades, or fronds.
Root-like structures anchor runners to shallow, sandy bottom. Dead plants disintegrate into sand. Spreads over reef like crust. Presented by the Indiana Academy Office of Outreach Programs , the UPS Foundation , the National Museum of Natural History , the Natural Partners Program , Ball State University , and Ball State Teachers College .