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.
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About this site
Knife Rock lies off Sri Lanka's eastern seaboard, in the vicinity of Trincomalee, an area known for its coastal rock formations along the Bay of Bengal. Dive operators in the area typically run boat trips out to sites like this from the harbor town itself. Divers here have reported barred thicklip, black-finned triggerfish, Hawaiian convict surgeonfish, Indian redfin butterflyfish, Indo-Pacific sergeant major, Moorish idol, striped surgeonfish, tawny hermit crab, and thumbprint emperor around the rock formation.
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.
Striped SurgeonfishAcanthurus lineatusReported here · unconfirmed
Tawny Hermit CrabCoenobita rugosusReported here · unconfirmed
Black-finned TriggerfishMelichthys indicusReported here · unconfirmed
Barred ThicklipHemigymnus fasciatusReported here · unconfirmed
Hawaiian Convict SurgeonfishAcanthurus triostegusReported here · unconfirmed
Moorish IdolZanclus cornutusReported here · unconfirmed
Thumbprint EmperorLethrinus harakReported here · unconfirmed
Indo-Pacific Sergeant MajorAbudefduf vaigiensisReported here · unconfirmed
Indian Redfin ButterflyfishChaetodon trifasciatusReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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