https://www.yahoo.com/news/mountains-sugar-found-ocean-under-192535826.html
Beneath the Mediterranean Sea lies thick beds of chrystal salt, (deposited during the MSC 6.5ma), now they find subsea "mountains" of chrystal sugar beneath the sea grass beds.
In florida, the big sugar companies drained vast parts of the everglades to plant sugar cane (origin: Papua).
I wonder if sirenians ever eat the seagrass roots or only the grass blades.
The rice of the sea: how a tiny grain could change the way humanity eats
https://www.theguardian.com/environment/2021/apr/09/sea-rice-eelgrass-marine-grain-chef-angel-leon-marsh-climate-crisis?utm_source=pocket_discover
from article:
+he noticed something he had missed in previous encounters with Zostera marina: a clutch of tiny green grains clinging to the base of the eelgrass.
+gluten-free, high in omega-6 and -9 fatty acids, and contains 50% more protein than rice per grain, according to Aponiente’s research. And all of it growing without freshwater or fertiliser.
+an article from 1973 in the journal Science on how it was an important part of the diet of the Seri, an Indigenous people living on the Gulf of California in Sonora, Mexico, and the only known case of a grain from the sea being used as a human food source. [H/t Terry Turner]