Super Mario Sunshine/Noki Bay blue coins

Under the falls
Look underwater to the left of where the water fall lands. Follow the trail of gold coins to find a blue coin at the end. There is a bubba swimming around down here who should be avoided. Also, don't collect all the gold coins on the swim down as you may need them for air on the swim back up. There is a 1-up below the coins but it's very difficult to get it and get back to the surface without drowning. Available all episodes except 3.

On the water (x2)
Two coins float just above the water. The first is to the left as you start. For the second, go to the left end of the cliff where it bows out in a semicircle. Then go straight out to sea from there to see the coin. Both coins are much easier to get once the water has been cleaned up starting episode 5, until then use the boat to reach them. In episode 1 the boat is right next to the first coin instead of at the boathouse where it normally is. Available all episodes except 3.

Upper right cubbyhole
Go up the right cliff face and when you reach the next to last ledge, the one where the second pulley drops you off, check on the right for some narrow ledges sticking out of the cliff face. Hover to the first one, then hover to the one on its right, where there may be a springboard. Use the springboard to get the ledge above, the do a series of back-flip and hover combinations to reach a ledge with a rocket nozzle crate. Back-flip and hover to the cubbyhole above to find a coin. In episodes 5 and 7 the springboard is missing but it's still possible, though more difficult, to reach the ledges above it. Instead of stopping at the next to last ledge on the route to the top of the waterfall, go up another ledge, then do a triple jump right and hover. You can avoid talking to Il Piantissimo in episode 5 by using the tricky ruins and hovering right from the ledge where Blooper Glooper was. Available all episodes except 3.

Upper right coin stack
From the ledge with the upper right cubbyhole coin, get the rocket nozzle and launch to collect gold coins and a blue coin at the top. You may have to hop just before the rocket goes off to get the extra few feet of altitude needed. Visible in all episodes except except 3, but not reachable in episode 5, 7 or 8 because the rocket nozzle isn't there.

Under the diving board
Locate the diving broad shaped ledge next to the top of the water fall. Go right and drop down to a ledge with a puddle of water, hop left from there and hover to a hole under the diving board, then collect the coin there. In episode 6 there is a turbo nozzle crate here as well, but in other episodes there is a block of ice with a 1-up inside. Available all episodes except 3.

Hidden wall kicks
From the hole under the diving board, drop and hover to another hole directly below. There is a vertical passage hidden behind a wall above this, though there are some windows to mark its position. Do a series of wall jumps to get to the top and collect the coin that's visible through the windows. See below under lower pulley crevice for an alternate and perhaps easier route. Available all episodes except 3.

Upper center cubbyhole
Get to the top of the purple shell. This is easiest to do in episode 6 since there are wires you can use to get from tower to tower, follow the walk-through for that episode if in doubt. When you get to the shell entrance do a back-flip to the top. In earlier episodes you can use the rocket to this spot. From the shell, look straight toward the cliff face and notice a cubbyhole. Rocket or hover toward it to either land inside or grab the ledge, then pick up the coin. For an alternative, see tricky ruins cubbyhole below. Available all episodes except 3.

Eely's domain (x4)
There are four blue coins in Eely-mouth's domain. When you enter the area, swim toward the outer walls and check the tops of the columns. It's much easier to do this in episode 8 because the columns have gold coins as well and you can refresh your air. Also the gold coins surrounding the blue coins make it easier to spot the location from a distance. In episode 8 there are two additional columns with gold coins only, so keep looking until you've found all six coin columns. Some of the coin columns go almost up to the ceiling so don't let yourself sink far when you're searching. Available episodes 4 and 8 only.

Hidden ruins
In addition to the tricky ruins of episode 2, there are many other places on the side of the cliff where water makes a section recede and reveal hidden routes or items.

Tricky ruins start
Spray the stone square to open the first maze in the tricky ruins. Go to the upper left and drop down into the opening below. Hop up to the ledge and collect the coin there. Available all episodes except 1 and 3.

Tricky ruins cubbyhole
Get to the second maze in the tricky ruins, From the top passage, hop out and hover up to the cubbyholes above. Hover from hole to hole to reach the second one from the left and get a blue coin. the other three holes as well as the four holes at the bottom of the maze have gold coins. Available all episodes except 1 and 3.

Hidden ruins lower left
Get the the ledge between the first and second mazes of the tricky ruins. Now go to the left end of the ledge and drop to the ledge below, it has a doorway behind it. This route doesn't work in episode 1 but you can still get to this ledge by bouncing on the floating wicker platform just off-shore. Enter the doorway and follow the hidden passage to a shallow opening further left. Spray the wall here to open a gap between two walls. There are three doorways in the left wall and two in the right wall. Wall jump to the lower doorway on the left, then follow the hidden passage to an opening in the cliff face where it bows out in a semicircle. Spray the squares there to reveal a blue coin in the cubbyhole behind the upper one.

Hidden ruins middle left
Open the gap between walls in the hidden ruins and wall jump to the middle doorway on the left, then follow the passage to an opening on the cliff face to the right of where the lower left tunnel opens. Spray the wall on the left and get the blue coin from the upper cubbyhole.

Hidden ruins upper left (x2)
Open the gap between walls in the hidden ruins and wall jump to the upper doorway on the left, then follow the hidden passage to an opening next to where the middle left tunnel opens. Drop from here to a very small ledge below. Spray the wall next to this ledge to open two cubbyholes with a blue coin in the upper one. Now hop to the ledge just to the right of this and spray the squares to get a blue coin in the cubbyhole on the right.

Hidden ruins lower right
Open the gap between walls in the hidden ruins and wall jump to the lower doorway on the right. Follow the short hidden path to an opening to the left of ledge between the two mazes of the tricky ruins. Collect the coin at the exit. you can also hover to the coin from the ledge nearby. Available all episodes except 3.

Hidden ruins upper right
Open the gap between walls in the hidden ruins and wall jump to the upper doorway on the right. Follow the hidden path to an opening high above the ledge between the two mazes of the tricky ruins. Collect the coin at the exit. Note, this gives a way to reach the ledge between the mazes in episode 1. You can also reach the coin from the ledge below using the rocket. Available all episodes except 3.

Lower pulley crevice
Go up the right cliff face as in the episode 1 walk-through. When you reach the second basket, drop and and from the cliff and sidle along the crevice to the left. At the end of the crevice, spray the wall and part of it will retreat into the cliff leaving an opening you can hop into. Wall jump to collect the coin there.

Tricky ruins M
Go to the ledge between the first and second mazes in the tricky ruins. Locate the graffiti M on the right and wash it off for a blue coin.

under the little land sticking out that is right next to the waterfall, is a blue coin. The grandfather is on that little piece of land. First appears in episode 1, uncork the waterfall. Also, if you spray every brown block, the wall will open up to reveal a pathway, and blue coins. Be sure that when your done fighting Glooper Blooper in the fifth episode, and you drop down, you spray all of the vases. One of the vases will have a blue coin

All 30
1) Above the water behind the start of the level (episodes 1,2,4,5,6,7,8). On the water

2) Above the water near Blue Coin 1 (episodes 1,2,4,5,6,7,8). On the water

3) Follow the trail of coins leading down under the waterfall... beware of drowning (episodes 1,2,4,5,6,7,8). Under the falls

4) Same as bullet point five in 100 coins Shine (episodes 1,2,4,5,6,7,8). Upper right coin stack?

5) Above where you got the Rocket Nozzle (episodes 1,2,4,5,6,7,8). Upper right cubbyhole?

6) In the hidden ruin by the second waterwheel. You have to spray it to reveal it (episodes 1,2,4,5,6,7,8).

7) Another hidden ruin right under the first one (episodes 1,2,4,5,6,7,8). Lower pulley crevice

8) Under the waterfall, hover over to the top hole (episodes 1,2,4,5,6,7,8). Under the diving board

9) Under the waterfall, jump down, hover over to the cave that is below the hole in number 8, and wall kick up (episodes 1,2,4,5,6,7,8). Hidden wall kicks

10) Spray the brown square to open the ruins. It is in the middle (episodes 1,2,4,5,6,7,8). Tricky ruins start

11) Spray the M Graffiti that is next to the ruins (episodes 1,2,4,5,6,7,8). Tricky ruins M

12) In one of the cubby holes in the second ruins (episodes 2,4,5,6,7,8). Tricky ruins cubbyhole

13) Go on top of the shell, look towards the ruins, locate the hole, and hover to it (episodes 1,2,4,5,6,7,8). Upper center cubbyhole

14) From 13, drop down and Rocket up to the Blue Coin next to 13. Hidden ruins upper right

15) From 14, hover over to the hole on the left (episodes 1,2,4,5,6,7,8). Hidden ruins lower right

16) From 15, hover over to the left to the smaller area and spray the right brown square (episodes 1,2,4,5,6,7,8). Hidden ruins upper left

17) From 16, hover over to the wall next to you and spray the top (episodes 1,2,4,5,6,7,8). Hidden ruins upper left

18) Spray the brown square on the big wall, enter the first hole from the left, go through the tunnel, and spray the top brown square (episodes 1,2,4,5,6,7,8).

19) Wall kick all the way up, climb the cliffs, and two brown squared have blue coins (episodes 1,2,4,5,6,7,8).

20) Same as 19 (episodes 1,2,4,5,6,7,8).

21) Go the same way you went to get the gold bird, jump down from the mountain, make it to the first platform you see, and spray the wall on bottom left (episodes 1,2,4,5,6,7,8).

22) From 16, there is another wall if you look top left. Rocket your way up there or go on a cliff and Rocket from there spray the top left. Hidden ruins middle left

23) Jump down to the treasure room. Spray the pottery (episodes 1,2,4,5,6,7,8).

24) Same as above (episodes 1,2,4,5,6,7,8).

25) Get the Turbo Nozzle (unlock in episode 1 or 2, where you get coin number 8) and spray the corresponding O (episode 6).

26) Same as above (episode 6).

27) Go under the waterfall to go into deep sea. They're on top of pillars (episode 4 and 8). Eely's domain

28) Same as above (episode 4 and 8). Eely's domain

29) Same as above (episode 4 and 8). Eely's domain

30) Same as above (episode 4 and 8). Eely's domain