According to the US Geological Survey ... the oceans contain about 1,338,000,000 cubic kilometers of water. A cubic meterof water is 1000 kg, and a cubic kilometer has 1,000,000,000 of those, so the overall total mass is 1,338,000,000,000,000,000,000 kg, or 1.338 x 1021 kg.
They weigh half a pound or less
10 lbs.
about 30 or 90
A sea squirt usually weighs 5 pounds!
the average sea cucumber can weigh up to 13 pounds. it is pretty extrodenary to find one over 20 pounds.
6 kg (13 lb.)
200 pounds
4 pounds
6000
twenty pounds
10 to 30 pounds maximum
500