I hate to say this but mermaids arent real....sorry
I do not know the required information to know how much the fictional characters weigh, considering they're underwater.
if they are out of water they can be really heavey
it weigh's about 200 pounds
They are about 5'9 and weigh 120
An average model weigh about 110 Ib.
Modst weigh about 2 pounds.
103 grams on average
On average they weigh about 4.5 tons and are about 9 metres in length.
an average person should weigh between 60 and 70kg
45
A lot
34kg