Yes, real sea moss typically expands when soaked in water.
The extent of expansion depends on the type of sea moss. Real sea moss, which is often thin, can expand up to three times its original size after being soaked. However, pool-harvested sea moss, which tends to be thicker, may not expand significantly when soaked. This difference in expansion is a key characteristic that helps distinguish between the two types. When preparing sea moss for consumption or topical use, soaking it in water is a crucial step that allows it to hydrate and soften, making it easier to blend or use. The expansion demonstrates that the sea moss is absorbing water, which is part of its preparation process.
