There will be many Genshin Impact students who want to know the location of the Fontainebleau buoys in Genshin Impact 4.0. Next is the "Locations of the Fontainebleau buoys in Genshin Impact 4.0" compiled by Sourcecode.com. Students who have questions in this regard can take a look below. Maybe I can help you.
There are currently 7 sea buoys on the sea in Fontaine. After defeating all the monsters on the buoys, you can get the treasure chest. The following is the location of the treasure chest on the sea in Fontaine.
Buoy monster location:
The first one is by the sea in Baisong Town.
The second one is on the lower right side of the sea.
The third one is between Nasi and Baisong Town.
The fourth one is located above Baisong Town and can be teleported upstream from the secret realm.
The fifth is located along the course below Fontainebleau.
The sixth is located below the Fontainebleau, on the upper right of Nas.
The seventh one can teleport the seabed anchor point upstream.
Finally teleport to this marked point and go up through the portal to get it.
These contents are summarized from the fact sheet, and I believe they can answer your questions on this issue. There are more high-quality guides about Genshin Impact on this website, you are welcome to check them out at any time.