Tetamanu's tidal passage is a less demanding and thus more enjoyable dive than Rangiroa's high-flow Tiputa. Not only that, the local gray reef sharks can be observed here within recreational depth limits, that is, between 20-30m. Special encounters are less probable though.
Besides the resident grays (
carcharhinus amblyrhynchos) and the occasional blacktip (
carcharhinus limbatus, not to be confused with the more common
carcharhinus melanopterus, a.k.a. blacktip reef shark), the healthy reef's alive with smaller & bigger fish, most noteworthy of these being several napoleons, which, like sharks, have alas become a rather rare sight these days in asian waters a.o.