
A small site on the Two Brothers that mixes wall diving with swims between slots and over rock, named for the number of nudibranchs found on it. Flabellinas are the ones divers come for. The zone of interest runs from 10 to 35 metres and the site bottoms out at 40, so the profile is set by how much macro time you want.
Also known as Nudirock.
Where it is and how deep
39.1257° N, 23.9855° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The topography is varied for a site this small: sections of wall, slots narrow enough to swim between, and stretches of rock to go over rather than around. The zone of interest is broad, 10 to 35 metres, with 40 metres as the maximum, so the dive can be planned deep along the wall or kept shallow across the rock depending on the group.
The reason to come is on the rock rather than in the water column. The site is named for the number of nudibranchs found here, flabellinas in particular, and the operator flags it as a site for micro life lovers. That makes it a slow, close-in dive with a light and a camera, working the surfaces as you pass - and it is why nitrox is recommended when the plan takes you towards the deeper end.
Marine life and season
- Nudibranchs
- Macro critters
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Off-season | Off-season | Off-season | Fair | Good | Prime | Prime | Prime | Prime | Good | Off-season | Off-season |
Season follows Alonissos & the Peristera Wreck: The underwater museum and most operators run May–Oct only; meltemi winds can close the exposed Peristera site in midsummer.
Questions divers ask
Why is Nudi Rock called that?+
The site is named after the number of nudibranchs found here, flabellinas in particular. The operator describes it as a must-dive for micro life lovers, with wall sections, slots and rock to work slowly with a light.
Sources
- Nudirock — Alonissos Triton Dive Center
- Alonissos dive sites — Scuba Hellas
In The Logbook
- Nudibranchs: species, habits and where to diveMacro & muck · 13 min read
More dive sites in Alonissos & the Peristera Wreck
A longer wall than the North, hung with old fishing nets
A drop-off from about 10 m to 33 m, then a seagrass bed
Reef
One of the area's dive highlights, and an ideal night dive
Wreck
Dubbed the Parthenon of Shipwrecks, and dated to 425-420 BC
A wooden hull at 22 m, found by following a sandy channel
Wall to 20 metres, then into the most famous cave on Alonissos
A boulder-strewn plain further offshore than the West side
Often ends in a small cave full of young fish
Similar dives elsewhere
A pocketed wall sloping to 40 m off Nikouria islet
Seahorses on the sand in 3 to 10 m, then a wall from 10 to 40 m
Colourful wall on Grgur dived down the anchor line, known for current
An overhanging sponge wall down to a 35 m wooden wreck at 42 m



