Meet the site
Remark and Frederick Islands offer some of the best-documented deep reef diving in the Recherche Archipelago. Marine Life Network describes Remark Island's sheltered northern side as shallower, with blue groper, morwong, boarfish, harlequin fish, western blue devils, silver drummer, yellowtail, bullseyes and seals, while its exposed southern side drops into 50 m with sponges, gorgonians, soft corals and black coral. Frederick Island, just east of Remark, is a large granite dome rising from 40 m, with depths of 20-40 m and similar marine life.
The contrast between the two sides of Remark makes it versatile. On the north, relaxed dives along granite boulders suit Advanced Open Water divers and allow time with the resident seals and big fish. On the south, the wall plunges through sponge and gorgonian gardens into black coral territory, a rare sight in recreational depths and a sign of the site's pristine condition.
Frederick Island's dome is a different experience: smooth granite rising from the depths, with fish concentrated around its flanks and top. It is best dived in flat conditions with a live boat.
These islands are a long way from Esperance and dived infrequently, so fish are abundant and relatively unafraid. They suit experienced divers visiting on a multi-day Esperance trip, ideally with nitrox and conservative profiles given the remoteness.
The Recherche was named in 1792 by the French admiral Bruni d'Entrecasteaux after his ship Recherche, while Esperance takes its name from his second vessel, Espérance. The archipelago's reserve status protects the islands, but the waters are not a no-take marine park, so crayfish and fish numbers vary with fishing pressure; the remoteness of islands such as Remark and Frederick keeps them among the richest.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Remark Island & Frederick Island is recorded as Island in Esperance & Recherche Archipelago. The listed access is boat (day trip). Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is Remark Island & Frederick Island suitable for my certification?
The record lists Technical (decompression). That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book Remark Island & Frederick Island through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Blue groper, morwong, boarfish, harlequin fish, western blue devil, silver drummer, yellowtail, bullseyes, New Zealand fur seals, Australian sea lions, sponges, gorgonians, soft corals, black coral
Location
Pair of granite islands in the Recherche Archipelago; Remark's sheltered north side is shallow while its exposed south drops to 50 m, and Frederick Island to the east is a granite dome rising from 40 m.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
marinelife.org.auRecord updated 27 Sept 2026. Source claims are being reviewed.