Thalassia testudinum

Turtle Grass, a reference photo
Photo: James St. John · CC BY 2.0 (licence)

Thalassia testudinum, commonly known as turtlegrass, is a species of marine seagrass in the family Hydrocharitaceae. It forms meadows in shallow, sandy water in locations in the Caribbean Sea and the Gulf of Mexico. Turtle grass and other seagrasses form meadows which are important habitats and feeding grounds. The grass is eaten by turtles and herbivorous fish, supports many epiphytes, and provides habitat for juvenile fish and many invertebrate taxa.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Turtle Grass being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Classification

Kingdom
Plantae
Phylum
Tracheophyta
Class
Liliopsida
Order
Alismatales
Family
Hydrocharitaceae
Species
Thalassia testudinum

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