Looking on the internet deeply has found these results:

in the ocean is the most popular phrase on the web.

at the ocean 113,300,000 results on the web	in the ocean 116,700,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
We're at the ocean. It's twilight. It's like being on a giant wave at the ocean and the thing's just tickling your back, same thing up there. He means he's got this sudden notion to stand on dry land, but just panhandle at the ocean. We could go and look at the ocean. I could see him from the porch, barking out at the ocean. I like to cry at the ocean, because only there do my tears seem small. We're at the ocean. He'd stand there, just staring at the ocean.	Your relationship was like jumping in the ocean for me. The 50000 tickets that you mentioned, Commissioner, these are a drop in the ocean. They swim in the ocean and they terrorize the whole community. We bask in the ocean for as long as possible. I lost you in the ocean once. It's made from an algae that grows in the ocean. LIFE is just a drop in the ocean of European policy. He is back in the ocean, happy hunting.

at the ocean

113,300,000 results on the web

in the ocean

116,700,000 results on the web

More popular!

We're at the ocean. It's twilight.
It's like being on a giant wave at the ocean and the thing's just tickling your back, same thing up there.
He means he's got this sudden notion to stand on dry land, but just panhandle at the ocean.
We could go and look at the ocean.
I could see him from the porch, barking out at the ocean.
I like to cry at the ocean, because only there do my tears seem small.
We're at the ocean.
He'd stand there, just staring at the ocean.

Your relationship was like jumping in the ocean for me.
The 50000 tickets that you mentioned, Commissioner, these are a drop in the ocean.
They swim in the ocean and they terrorize the whole community.
We bask in the ocean for as long as possible.
I lost you in the ocean once.
It's made from an algae that grows in the ocean.
LIFE is just a drop in the ocean of European policy.
He is back in the ocean, happy hunting.