Grouper's Rock
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
Dived here today? How were conditions vs. what we showed?
About this site
Grouper's Rock sits in the waters off Mnemba Island, a small coral islet off the northeast coast of Zanzibar in Tanzania, within the marine conservation area that surrounds it. Dive sites around Mnemba are typically reached by boat from Zanzibar's northern coastal towns. It is a reef dive reaching a maximum depth of around 30 metres, rated beginner. Ghost pipefish, grouper, lionfish, and scorpionfish are regularly found here, and divers have also reported moray eels, Napoleon wrasse, reef sharks, sea turtles, and stonefish, including the poisonous stonefish some have flagged as a hazard on the reef.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Moray eelMoray eelReported here · unconfirmed
Reef sharkReef sharkReported here · unconfirmed
Sea turtleSea turtleReported here · unconfirmed
Ghost pipefishGhost pipefishConfirmed present · 2 independent sources
ScorpionfishScorpionfishConfirmed present · 2 independent sources
Napoleon (humphead) wrasseNapoleon (humphead) wrasseReported here · unconfirmed
StonefishStonefishReported here · unconfirmed
GrouperGrouperConfirmed present · 2 independent sources
LionfishLionfishConfirmed present · 2 independent sources
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
No notes yet. Dived here? Be the first to leave a tip.
Share a write-up or a photo. Submissions are reviewed before they appear on the page.
Nearby dive sites
Shops that dive here
No shops have listed this site yet.