There are no mermaids in the Sims games.
Girls are not born "with fins", and there are no "real mermaids", so the question is kind of pointless.
H20 or mako mermaids
Afraid not...Mermaids dont exist and humans cant breathe underwater.
They can't. Mermaids do not exist in real life and it is impossible to change into a different creature.
A twist in tail
The H2O girls did not use a spell. On the night of a full moon they went into the moon pool at Mako Island. They didn't know they were going to become mermaids, and they weren't trying to become mermaids.
No, they are just regular people in costumes.
Because they are little girls, or they aren't mentally stable.
In the show "H2O: Just Add Water," the girls become mermaids after coming into contact with a mysterious moon pool during a full moon. This magical event triggers a transformation that gives them the ability to control water and transform into mermaids when they come into contact with water.
No the tails are made of fake scales, silicone, and wet suit
with special powers from the deep blue sea.