Depth, salinity, currents, waves, and brightness.
The ocean is salt water and has alot of creatures . Everybody knows or will discover that .
the most obvious one is the leaves.
If mermaids existed (which they don't) they would presumably be mammals. At least, most depictions of mermaids show them with obvious mammalian characteristics (specifically, obvious human characteristics; most mammals do not have large, permanent breasts).
it was really obvious. THE PACIFIC OCEAN
There are bound to be many characteristics confined to fish but to me the most obvious are their Fins and their Swimbladders.
They're close to the ocean
The Pacific Ocean, the Atlantic Ocean, and less obvious is the Arctic Ocean.
they have no antenae no obvious head
You can do virtually everything in the ocean that you can do on land, with a few obvious exceptions, such as lighting a campfire.
what are three characteristics of earth's ocean
by the ocean
The most obvious effect of the gravitational pull of the moon and the sun, is the tides visible on beaches.
rapid tempature change is the main characteristic that effects deep ocean currents.