Thankfully, this is an easy seed to enter! This one brings you to a small island. Now, I know what you're thinking, 'why would anyone want a small island?' Well, an underwater city, that's why.
An underwater city is one of the most difficult builds a player can undertake, but the end result is well worth the trouble and time. Just take a look above for a quick example.
This ocean is two thousand blocks wide, so there is plenty of room. However, Creative Mode is almost a requirement to build here. Unless you're super hardcore, of course.
Insert seed '7wo'