I am in a big hurry, so this is just the start of the answer to the questions posed two posts below, but...
- a University of British Columbia fisheries expert did the first major fish biomass estimation a couple of years ago, and came up with 0.8-2bn tons.
- as sideline info, a 2004 study suggested that microbes make up 90% of ocean biomass.
- as sideline to the above, scientists doing that study said they found 13,000 new marine species in 2004.
To all of the above, I say: crikey. I will investigate further. Stay on the edges of your seats.