Dive Sites
Bili Bok
dive site type: caves & caverns
difficulty: medium
depth range: 0-20 m
distance from the diving center: 8 nm
short characteristic: located close to Rukavac and accessible by boat and car diving site consists of a system of 6 caverns, which differ in shapes and sizes, but all are covered by colourful sponges and inhabited by various nocturnal animals
BILI BOK — A DIVER’S DREAMSCAPE
On the south side of Vis lies Bili Bok, a site favored by guides for its mix of caves, swim-throughs, and varied terrain.
Expect:
long corridors between boulders
chimney-like passages where you rise through shafts of light
amphora fragments
brilliant sponges
nudibranchs and moray eels
This is an excellent second dive of the day — relaxing but filled with life.
As usually when it comes to caves – the majority of life and activity can be found at the border of light and dark. This is where divers can meet numerous crustaceans, here also hunt scorpionfish and moray eels. Inside the caverns divers can see colourful walls and ceilings – very richly covered by various plant and animal organisms. The bottoms, it turn, are made of granular material of sizes of sand and silt. The the darkest places thousands of tiny shrimps can be found on sandy bottom. A very characteristic fish for enclosed spaces is a cardinalfish – a red fish with a large eye. A careful diver can see that the cardinalfish always moves directing the abdominal part of the body to the bedrock, regardless of whether it is the bottom, wall or ceiling, therefore in the caves it can be observed that cardinalfish are swimming belly up. On the ceiling divers can sometimes see their reflections – bubbles released by divers while breathing in some places cannot find an exit and create small airbags, which at a right angle create a mirror-like effect.
