Aboard a sailing boat, water activities are not lacking!
You can go around Taiohae bay with the kayak.
With your scuba kit, go snorkeling and spearfishing with the dinghy.
If you prefer, a diving club in Taiohae offers excursions to see manta rays, hammer-head sharks and melon-headed wales.
If your interest is in fishing, ask to local crews if you can go with them aboard their poti marara (local boat) for a fishing trip: trolling and big game fishing for tuna, wahoo, dorado, swordfish, marlin…