[2] Sargassum aquifolium can reach up to 30 centimeters with a flat main branch and wide, short, spiny leaves.

[2] Sargassum aquifolium can be found growing year-round in subtidal ranges with rocky terrain and reef flats.

[5] Sargassum aquifolium is common to wave-washed lava benches and can also be found in warm, calm tide pools with depths of more than 3 meters (10 feet).

[5] This seaweed grows in habitats where waves are present and moderate and usually thrives in the North Pacific where winter swells come in.

[4] A ceremony called Hoʻoponopono used the leaves of the seaweed to pray to the gods and ask for forgiveness if they had offended anyone in the circle.

[8] It gained the named limu honu after people realized that turtles enjoyed eating the seaweed too.