Tahaa and Raiatea are special: 2 islands surrounded by one barrier reef. The water of the lagoon is deep on most places so one can sail almost around both islands inside the reef. There is a beautifull shallow coral garden near motu TauTau at the west side of Tahaa so time for more snorkling.
There is a constant current from the sea into the lagoon. Just leave your dinghy on anchor, walk over the motu to the ocean and then drift back as on the picture above.
This botanical garden in a breathtaking setting has been restored in its former glory a few years ago and is very well maintained. A very enjoyable visit and there is much more to do on Raiatea, see https://lesdeuxpiedsdehors.com/en/raiatea-island-french-polynesia/