Halimeda tuna - AbsoluteAstronomy.com

Halimeda tuna is a species of green macroalgae.

Halimeda tuna is the type species of the genus Halimeda
Halimeda
Halimeda is a genus of green macroalgae. The algal body is composed of calcified green segments. Calcium carbonate is deposited in its tissues, making it inedible to most herbivores....

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