"Sea grapes" sound like something Poseidon would snack on, not a killer algae. Yet Caulerpa racemosa var. cylindracea poses a serious threat to marine life. Spread in the bilge water of boats, this fast-growing alga is quick to take root, squeezing out native species. But there is one spot in the Mediterranean where Caulerpa hasn't yet taken over, and biologists like Ruiz Fernández are trying to discover why. Narrated by Ari Daniel Shapiro. Produced by Atlantic Public Media (www.atlantic.org) and Eduardo Garcia Milagros. Download the Google Earth Tour kmz file here: education.eol.org

Author: EncyclopediaOfLife
Source: YouTube