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Green bubble weed
Dictyosphaeria cavernosa
(Forsskål) Børgesen, 1932

The plant forms a large, green, hollow, nearly spherical mass that may be lobed or may collapse or rupture but continues to grow; up to 10 cm in diameter. The wall is crisp, crunchy and show large, angular cells.

It grows in most reef environments, attached to rocky substrates and areas of dead coral. On occasion it covers extensive areas, especially under high nutrient levels.

South Florida, Bahamas and Caribbean.

Green bubble weed (Dictyosphaeria cavernosa)