has little sacks of air to keep it floating
Bladderwrack is a Fucus Vesiculosus/algae. Bladderwrack is a common name for Rockweed.
It's so the bladderwrack can keep warm. The bladderwrack is the bladderofseaweed and so that is why the bubbles are there
A bladderwrack is a variety of seaweed, Latin name Fucus vesiculosus, in which iodine was first discovered.
Bladderwrack in Tamil is known as "நீர் கொக்கு" (Neer Kokku).
they can breath
your fat
They are so well adapted to the water that they can't survive without it.
because they do it
It urges the sea to adapt to IT! The litle urchin urger.
movement
Yes, surface sea water is evaporated.
That is the way they have adapted, it is the same as asking why a fish lives in water.