Genus Sargassum

1. Habit. 2. Phylloids. 3. Low intertidal (Son Hai, Ninh Nhuan Province, Vietnam). April 2007.

1. Fragment of the plant. 2. Vesicles. 3. Habit. Inset: Phylloids. China, Hainan Island, April 2012.

1. Fragment. 2. Enlarged fragment with vesicles. 3. In aquarium (Japan, Amakusa Island). April 2013.

1. Phylloids with irregularly dentate margins. 2. Vesicles. 3. Subtidal (Nha Trang Bay, Vietnam). April 2007.

1, 2. Fragments of the plant with vesicles and receptacles. 3. In habitat (Japan, Amakusa, April 2013).

1. Habit. 2. In habitat (Japan, Amakusa Island, April 2013). Insets: Fragments with phylloids and vesicles.

1. Fragment with vesicles. 2. Young plant (China, Qingdao, Yellow Sea), October 2008. 3. In habitat, Japan, Amakusa Island. August 2013.

1. Upper portion of branch. 2. Phylloids. 3. Receptacles and vesicle. 4. Upper sub-tidal (Nha Trang Bay, Vietnam). April 2007.

1. Upper portion of male plant with receptacles. 2. Fragment with receptacles, phylloids and vesicles. 3. Vesicles and phylloids. Hainan Island. April 2012.

1, 3. Cast ashore. 2. Habit. Japan, Amakusa Island, August 2013.

1. Upper part of branch. 2. Vesicles. 3. Basal portion of plant. 4. Habit (Nha Trang Bay, Vietnam, April 2006).

1. Fragment showing pinnately dissected phylloids. 2. Vesicles. 3. Part of plant. Korea, Jeju Island, October 2009.

1. Upper portion of branch. 2. Vesicles and receptacles. 3. Part of plant (Hainan Island, China). April 2012.

1. Phylloids. 2. Vesicles. 3. Receptacles. 4. In habitat, Peter the Great Bay, the Sea of Japan, August 2012.

1. Phylloids. 2. Vesicles. 3. Fragment with vesicles. 4. Habit (in aquarium). 5. In upper subtidal (Nha Trang Bay, Vietnam). March 2006.

1. Habit. 2. Basal portion. 3. Upper subtidal (Peter the Great Bay, the Sea of Japan, Russia). August 2010. Inset: Fragment with vesicles.

1. Fragment with phylloids and vesicles. 2. In habitat, Amakusa Islands, Japan, April 2013.

1. The upper portion with vesicles and phylloids. 2. In habitat, Amakusa Island, Japan, April 2013.

1, 2, 3. Fragments with vesicles and phylloids (Amakusa Island, Japan). February 2014 (Cast ashore).

1. Habit and fragment of main axis. Inset: basal part. 2. Habitat, subtidal (Nha Trang Bay, Vietnam). April 2007.