MrL1193
Inkling Cadet
That Bluefin Depot video reminds me of something else I discovered that you can do there, though I'm not sure it's useful. I don't have a video of it handy (because I haven't played while Bluefin was in the rotation lately), but I can try to describe it for you guys.
So you know how the two sides in the middle are separated by water? At each end of the area, there's a recessed wall area over the water, right between the inkable walls that you would normally use to climb up to the top area. (You can see it on the left side of the screen in AnchorTea's video.) You can actually use that wall area to cross over to the other side, provided that you're willing to spend the time inking the path. You need to ink the wall on your side next to the gate fairly low down (so you can jump to it), then ink a path up and over the gate and around to the top area of the wall on the other side, right up against the vertical pipe that's supposed to block you from dropping down on that side. (Spoilers: It doesn't.) You'll also want to ink the wall just below ground level on the other side so you can make the following jump.
So remember what I said about that vertical pipe not actually blocking you? The reason you can get around it is that you actually have a lot of height to work with here. Swim up fairly high on the wall next to it, and then simultaneously press down (directly away from the wall) and jump. This will allow you to clear the pipe and move sideways around it in the air. You should then be able to stick to the wall just below ground level and climb up onto the other side.
Again, I'm not sure this is useful, but unlike the Kelp Dome fence jump, this trick is actually not very difficult once you know the inputs needed to jump around the pipe.
So you know how the two sides in the middle are separated by water? At each end of the area, there's a recessed wall area over the water, right between the inkable walls that you would normally use to climb up to the top area. (You can see it on the left side of the screen in AnchorTea's video.) You can actually use that wall area to cross over to the other side, provided that you're willing to spend the time inking the path. You need to ink the wall on your side next to the gate fairly low down (so you can jump to it), then ink a path up and over the gate and around to the top area of the wall on the other side, right up against the vertical pipe that's supposed to block you from dropping down on that side. (Spoilers: It doesn't.) You'll also want to ink the wall just below ground level on the other side so you can make the following jump.
So remember what I said about that vertical pipe not actually blocking you? The reason you can get around it is that you actually have a lot of height to work with here. Swim up fairly high on the wall next to it, and then simultaneously press down (directly away from the wall) and jump. This will allow you to clear the pipe and move sideways around it in the air. You should then be able to stick to the wall just below ground level and climb up onto the other side.
Again, I'm not sure this is useful, but unlike the Kelp Dome fence jump, this trick is actually not very difficult once you know the inputs needed to jump around the pipe.