Big Brother — Brothers Islands

Planning a trip?

Hotels, dive operators, gear, and how to get here are on the Brothers Islands location page.

Overview

Offshore pinnacle in the southern Red Sea with two wrecks on the plateau — the Numidia and the Aida. Walls drop into the blue where oceanic whitetips, threshers, and hammerheads cruise. Strong current makes it advanced-only.

Briefing note

Liveaboard-only access — no day-boat trips reach Brothers.

What you'll see

4 species curated

Oceanic whitetip shark
seasonal
Peak: Oct · Nov · Dec
Thresher shark
seasonal
Scalloped hammerhead
seasonal
Peak: Jun · Jul · Aug
Grey reef shark
year-round

Sightings evidence

1 record on file

Oceanic whitetip shark
medium confidence
Last confirmed
Dec 2025
Recent records
45 within 50 km
Cluster months
Oct, Nov, Dec

Sources & methodology

How we summarise this

We aggregate confirmed occurrence records from GBIF and OBIS within a fixed radius of each dive site. Occurrence records confirm presence and reveal seasonality clustering, but they DO NOT measure per-dive probability — there is no eligible-effort denominator. We deliberately do not publish a numeric '% chance of sighting' from this data.

Sources

Global Biodiversity Information Facility — GBIF Secretariat
Ocean Biodiversity Information System — IOC-UNESCO
iNaturalist — California Academy of Sciences & National Geographic Society
IUCN Red List of Threatened Species — International Union for Conservation of Nature
Wildbook (Sharkbook, Whale Shark, Manta Matcher) — Wild Me
OBIS-SEAMAP — Duke University Marine Geospatial Ecology Lab / OBIS
WoRMS — World Register of Marine Species — Flanders Marine Institute (VLIZ)
FishBase — FishBase Consortium
Atlas of Living Australia — CSIRO / GBIF Australia
REEF Volunteer Fish Survey — Reef Environmental Education Foundation

Conditions

Month	Water	Visibility	Current
Jan	22–24 °C	20–30 m	moderate
Feb	21–23 °C	20–30 m	moderate
Mar	22–24 °C	25–35 m	moderate
Apr	24–26 °C	25–35 m	moderate
May	25–27 °C	25–35 m	moderate
Jun	27–29 °C	25–35 m	strong
Jul	28–30 °C	25–35 m	strong
Aug	28–30 °C	25–35 m	strong
Sep	27–29 °C	25–35 m	strong
Oct	26–28 °C	25–35 m	moderate
Nov	24–26 °C	25–35 m	moderate
Dec	23–25 °C	20–30 m	moderate

Season calendar

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Peak season highlighted · current month outlined

Gear for this site

Beyond the basic kit

SMB + long reel — Drift exits in open ocean — operators want long-line SMB.
Dive light — Two wrecks on the plateau, both worth penetrating with a guide.

Next step

Book your trip to Brothers Islands

Hotels, liveaboards, dive operators, gear recommendations, and travel logistics for the whole region.

Plan your trip →

Some links earn us a commission. Learn more