One hectare test farm in Australian deserts was designed to yield 20
tons of camel and kangaroo meat by feeding the algae , as well as the
135 tons of mixed sea foods including mainly prawns and crayfish/
lobster from a one hectare salt water aquaculture farm
.
The largest spiny lobster on record was over 1 m (3 ft) long and
weighed over 11.8 kg (26 lb)[3].
http://en.wikipedia.org/wiki/Spiny_lobster
it is not uncommon to catch individuals weighing 10 kg.and they lay
half a million eggs at a time
http://en.wikipedia.org/wiki/Southern_rock_lobster
.
prawns lay up to a million eggs at a time
http://en.wikipedia.org/wiki/Shrimp_farming
.
they all eat algae or its by product that will grow in salt water /
sea water
http://en.wikipedia.org/wiki/Algae
.