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re:Real Plants in Seawater
From the Book "Aquatic Plants of Australia" by Helen Aston there are
several full marine vascular plants.
Genus: Thalassodendron which is described as rhizomatous, dioecious, marine
perennial.
Genus: Posidonia which is described as a submerged, rhizomatous, marine
perannial.
Genus: Thalassia which is described as a coarse, submerged, marine plant,
creeping rhizome with simple roots and annular scars.
There are plenty of others
This is not off topic if you keep Dugong (a type of sea cow)in your very
large aquarium.
Dave Wilson
>> However there are turtle grasses and marine grasses that live
>> in the water on the Puget Sound that resemble freshwater valisneria. The
>> last two are vascular plants.
>
>Just as similar grasses live in Tampa Bay and some (very restricted)
>parts of San Francisco Bay. These higher plants actually do make it in
>highly brackish conditions, but never are found in sea water not diluted
>by *some* fresh water, AFAIK. Puget Sound is a classic example. The
>influx of fresh water is huge there.
>
>>
>> Yes there are plants which grow in "pure sea water".
>
>But I still believe all are algae. I'm aware of no exceptions.
>
>>
>> Sorry for the flame and off the subject of live foods.
>
>Don't apologize for requiring me to clarify what I meant. We rely on
>information here, so if I'm still wrong about higher plants not living
>in open sea water, I certainly hope some botanist jumps in and corrects
>me.