Any technologies available now to extract hydrogen fuel from deuterium naturally occurring in deepest seas?

Question

For scientists, specialists in hydrogen fuel application, staff members of research centers, project developer who may be interested in joining the preliminary studies for hydrogen fuel from deuterium of deepest seas.

Answer 1

Ummmm.... First deuterium is hydrogen, so please go ask any science teacher you have ever had to change your grade to an F.  Second why would you go through all the work of extracting hydrogen from the "deepest seas" when we could get it from water on the surface?

Answer 2

Deuterium is used in nuclear reactors, not hydrogen fuelled cars.  Exactly why would you need deuterium?  Especially from "the deepest oceans"?  You don't have to go to the bottom of the ocean to find heavy water.  But I know Canada could use a cheap source of D2O right now so what's the deal?